21145722

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{431}}^1$

素因数の和:503

約数の個数: 64

約数和(自身を含む): 49641984

約数和(自身を除く): 28496262

約数列:

[1, 2, 3, 6, 13, 17, 26, 34, 37, 39, 51, 74, 78, 102, 111, 221, 222, 431, 442, 481, 629, 663, 862, 962, 1258, 1293, 1326, 1443, 1887, 2586, 2886, 3774, 5603, 7327, 8177, 11206, 14654, 15947, 16354, 16809, 21981, 24531, 31894, 33618, 43962, 47841, 49062, 95251, 95682, 190502, 207311, 271099, 285753, 414622, 542198, 571506, 621933, 813297, 1243866, 1626594, 3524287, 7048574, 10572861, 21145722]

約数ペア:

[(1, 21145722), (2, 10572861), (3, 7048574), (6, 3524287), (13, 1626594), (17, 1243866), (26, 813297), (34, 621933), (37, 571506), (39, 542198), (51, 414622), (74, 285753), (78, 271099), (102, 207311), (111, 190502), (221, 95682), (222, 95251), (431, 49062), (442, 47841), (481, 43962), (629, 33618), (663, 31894), (862, 24531), (962, 21981), (1258, 16809), (1293, 16354), (1326, 15947), (1443, 14654), (1887, 11206), (2586, 8177), (2886, 7327), (3774, 5603)]