20121640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{139}}^1$

素因数の和:215

約数の個数: 128

約数和(自身を含む): 58060800

約数和(自身を除く): 37939160

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 47, 55, 56, 70, 77, 88, 94, 110, 139, 140, 154, 188, 220, 235, 278, 280, 308, 329, 376, 385, 440, 470, 517, 556, 616, 658, 695, 770, 940, 973, 1034, 1112, 1316, 1390, 1529, 1540, 1645, 1880, 1946, 2068, 2585, 2632, 2780, 3058, 3080, 3290, 3619, 3892, 4136, 4865, 5170, 5560, 6116, 6533, 6580, 7238, 7645, 7784, 9730, 10340, 10703, 12232, 13066, 13160, 14476, 15290, 18095, 19460, 20680, 21406, 26132, 28952, 30580, 32665, 36190, 38920, 42812, 45731, 52264, 53515, 61160, 65330, 71863, 72380, 85624, 91462, 107030, 130660, 143726, 144760, 182924, 214060, 228655, 261320, 287452, 359315, 365848, 428120, 457310, 503041, 574904, 718630, 914620, 1006082, 1437260, 1829240, 2012164, 2515205, 2874520, 4024328, 5030410, 10060820, 20121640]

約数ペア:

[(1, 20121640), (2, 10060820), (4, 5030410), (5, 4024328), (7, 2874520), (8, 2515205), (10, 2012164), (11, 1829240), (14, 1437260), (20, 1006082), (22, 914620), (28, 718630), (35, 574904), (40, 503041), (44, 457310), (47, 428120), (55, 365848), (56, 359315), (70, 287452), (77, 261320), (88, 228655), (94, 214060), (110, 182924), (139, 144760), (140, 143726), (154, 130660), (188, 107030), (220, 91462), (235, 85624), (278, 72380), (280, 71863), (308, 65330), (329, 61160), (376, 53515), (385, 52264), (440, 45731), (470, 42812), (517, 38920), (556, 36190), (616, 32665), (658, 30580), (695, 28952), (770, 26132), (940, 21406), (973, 20680), (1034, 19460), (1112, 18095), (1316, 15290), (1390, 14476), (1529, 13160), (1540, 13066), (1645, 12232), (1880, 10703), (1946, 10340), (2068, 9730), (2585, 7784), (2632, 7645), (2780, 7238), (3058, 6580), (3080, 6533), (3290, 6116), (3619, 5560), (3892, 5170), (4136, 4865)]