21559965

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{107}}^1$

素因数の和:242

約数の個数: 64

約数和(自身を含む): 42301440

約数和(自身を除く): 20741475

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 101, 105, 107, 133, 285, 303, 321, 399, 505, 535, 665, 707, 749, 1515, 1605, 1919, 1995, 2033, 2121, 2247, 3535, 3745, 5757, 6099, 9595, 10165, 10605, 10807, 11235, 13433, 14231, 28785, 30495, 32421, 40299, 42693, 54035, 67165, 71155, 75649, 162105, 201495, 205333, 213465, 226947, 378245, 615999, 1026665, 1134735, 1437331, 3079995, 4311993, 7186655, 21559965]

約数ペア:

[(1, 21559965), (3, 7186655), (5, 4311993), (7, 3079995), (15, 1437331), (19, 1134735), (21, 1026665), (35, 615999), (57, 378245), (95, 226947), (101, 213465), (105, 205333), (107, 201495), (133, 162105), (285, 75649), (303, 71155), (321, 67165), (399, 54035), (505, 42693), (535, 40299), (665, 32421), (707, 30495), (749, 28785), (1515, 14231), (1605, 13433), (1919, 11235), (1995, 10807), (2033, 10605), (2121, 10165), (2247, 9595), (3535, 6099), (3745, 5757)]