19912970

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{2351}}^1$

素因数の和:2387

約数の個数: 48

約数和(自身を含む): 45045504

約数和(自身を除く): 25132534

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 121, 154, 242, 385, 605, 770, 847, 1210, 1694, 2351, 4235, 4702, 8470, 11755, 16457, 23510, 25861, 32914, 51722, 82285, 129305, 164570, 181027, 258610, 284471, 362054, 568942, 905135, 1422355, 1810270, 1991297, 2844710, 3982594, 9956485, 19912970]

約数ペア:

[(1, 19912970), (2, 9956485), (5, 3982594), (7, 2844710), (10, 1991297), (11, 1810270), (14, 1422355), (22, 905135), (35, 568942), (55, 362054), (70, 284471), (77, 258610), (110, 181027), (121, 164570), (154, 129305), (242, 82285), (385, 51722), (605, 32914), (770, 25861), (847, 23510), (1210, 16457), (1694, 11755), (2351, 8470), (4235, 4702)]