21552440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1$

素因数の和:253

約数の個数: 128

約数和(自身を含む): 61931520

約数和(自身を除く): 40379080

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 31, 35, 40, 52, 56, 62, 65, 70, 91, 104, 124, 130, 140, 155, 182, 191, 217, 248, 260, 280, 310, 364, 382, 403, 434, 455, 520, 620, 728, 764, 806, 868, 910, 955, 1085, 1240, 1337, 1528, 1612, 1736, 1820, 1910, 2015, 2170, 2483, 2674, 2821, 3224, 3640, 3820, 4030, 4340, 4966, 5348, 5642, 5921, 6685, 7640, 8060, 8680, 9932, 10696, 11284, 11842, 12415, 13370, 14105, 16120, 17381, 19864, 22568, 23684, 24830, 26740, 28210, 29605, 34762, 41447, 47368, 49660, 53480, 56420, 59210, 69524, 76973, 82894, 86905, 99320, 112840, 118420, 139048, 153946, 165788, 173810, 207235, 236840, 307892, 331576, 347620, 384865, 414470, 538811, 615784, 695240, 769730, 828940, 1077622, 1539460, 1657880, 2155244, 2694055, 3078920, 4310488, 5388110, 10776220, 21552440]

約数ペア:

[(1, 21552440), (2, 10776220), (4, 5388110), (5, 4310488), (7, 3078920), (8, 2694055), (10, 2155244), (13, 1657880), (14, 1539460), (20, 1077622), (26, 828940), (28, 769730), (31, 695240), (35, 615784), (40, 538811), (52, 414470), (56, 384865), (62, 347620), (65, 331576), (70, 307892), (91, 236840), (104, 207235), (124, 173810), (130, 165788), (140, 153946), (155, 139048), (182, 118420), (191, 112840), (217, 99320), (248, 86905), (260, 82894), (280, 76973), (310, 69524), (364, 59210), (382, 56420), (403, 53480), (434, 49660), (455, 47368), (520, 41447), (620, 34762), (728, 29605), (764, 28210), (806, 26740), (868, 24830), (910, 23684), (955, 22568), (1085, 19864), (1240, 17381), (1337, 16120), (1528, 14105), (1612, 13370), (1736, 12415), (1820, 11842), (1910, 11284), (2015, 10696), (2170, 9932), (2483, 8680), (2674, 8060), (2821, 7640), (3224, 6685), (3640, 5921), (3820, 5642), (4030, 5348), (4340, 4966)]