81901960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{5519}}^1$

素因数の和:5590

約数の個数: 64

約数和(自身を含む): 214617600

約数和(自身を除く): 132715640

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 53, 56, 70, 106, 140, 212, 265, 280, 371, 424, 530, 742, 1060, 1484, 1855, 2120, 2968, 3710, 5519, 7420, 11038, 14840, 22076, 27595, 38633, 44152, 55190, 77266, 110380, 154532, 193165, 220760, 292507, 309064, 386330, 585014, 772660, 1170028, 1462535, 1545320, 2047549, 2340056, 2925070, 4095098, 5850140, 8190196, 10237745, 11700280, 16380392, 20475490, 40950980, 81901960]

約数ペア:

[(1, 81901960), (2, 40950980), (4, 20475490), (5, 16380392), (7, 11700280), (8, 10237745), (10, 8190196), (14, 5850140), (20, 4095098), (28, 2925070), (35, 2340056), (40, 2047549), (53, 1545320), (56, 1462535), (70, 1170028), (106, 772660), (140, 585014), (212, 386330), (265, 309064), (280, 292507), (371, 220760), (424, 193165), (530, 154532), (742, 110380), (1060, 77266), (1484, 55190), (1855, 44152), (2120, 38633), (2968, 27595), (3710, 22076), (5519, 14840), (7420, 11038)]