21805000720

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{2801}}^1$

素因数の和:2961

約数の個数: 160

約数和(自身を含む): 54301953024

約数和(自身を除く): 32496952304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 43, 62, 73, 80, 86, 124, 146, 155, 172, 215, 248, 292, 310, 344, 365, 430, 496, 584, 620, 688, 730, 860, 1168, 1240, 1333, 1460, 1720, 2263, 2480, 2666, 2801, 2920, 3139, 3440, 4526, 5332, 5602, 5840, 6278, 6665, 9052, 10664, 11204, 11315, 12556, 13330, 14005, 15695, 18104, 21328, 22408, 22630, 25112, 26660, 28010, 31390, 36208, 44816, 45260, 50224, 53320, 56020, 62780, 86831, 90520, 97309, 106640, 112040, 120443, 125560, 173662, 181040, 194618, 204473, 224080, 240886, 251120, 347324, 389236, 408946, 434155, 481772, 486545, 602215, 694648, 778472, 817892, 868310, 963544, 973090, 1022365, 1204430, 1389296, 1556944, 1635784, 1736620, 1927088, 1946180, 2044730, 2408860, 3271568, 3473240, 3733733, 3892360, 4089460, 4817720, 6338663, 6946480, 7467466, 7784720, 8178920, 8792339, 9635440, 12677326, 14934932, 16357840, 17584678, 18668665, 25354652, 29869864, 31693315, 35169356, 37337330, 43961695, 50709304, 59739728, 63386630, 70338712, 74674660, 87923390, 101418608, 126773260, 140677424, 149349320, 175846780, 253546520, 272562509, 298698640, 351693560, 507093040, 545125018, 703387120, 1090250036, 1362812545, 2180500072, 2725625090, 4361000144, 5451250180, 10902500360, 21805000720]

約数ペア:

[(1, 21805000720), (2, 10902500360), (4, 5451250180), (5, 4361000144), (8, 2725625090), (10, 2180500072), (16, 1362812545), (20, 1090250036), (31, 703387120), (40, 545125018), (43, 507093040), (62, 351693560), (73, 298698640), (80, 272562509), (86, 253546520), (124, 175846780), (146, 149349320), (155, 140677424), (172, 126773260), (215, 101418608), (248, 87923390), (292, 74674660), (310, 70338712), (344, 63386630), (365, 59739728), (430, 50709304), (496, 43961695), (584, 37337330), (620, 35169356), (688, 31693315), (730, 29869864), (860, 25354652), (1168, 18668665), (1240, 17584678), (1333, 16357840), (1460, 14934932), (1720, 12677326), (2263, 9635440), (2480, 8792339), (2666, 8178920), (2801, 7784720), (2920, 7467466), (3139, 6946480), (3440, 6338663), (4526, 4817720), (5332, 4089460), (5602, 3892360), (5840, 3733733), (6278, 3473240), (6665, 3271568), (9052, 2408860), (10664, 2044730), (11204, 1946180), (11315, 1927088), (12556, 1736620), (13330, 1635784), (14005, 1556944), (15695, 1389296), (18104, 1204430), (21328, 1022365), (22408, 973090), (22630, 963544), (25112, 868310), (26660, 817892), (28010, 778472), (31390, 694648), (36208, 602215), (44816, 486545), (45260, 481772), (50224, 434155), (53320, 408946), (56020, 389236), (62780, 347324), (86831, 251120), (90520, 240886), (97309, 224080), (106640, 204473), (112040, 194618), (120443, 181040), (125560, 173662)]