18197725

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 29303680

約数和(自身を除く): 11105955

約数列:

[1, 5, 7, 13, 19, 25, 35, 65, 91, 95, 133, 175, 247, 325, 421, 455, 475, 665, 1235, 1729, 2105, 2275, 2947, 3325, 5473, 6175, 7999, 8645, 10525, 14735, 27365, 38311, 39995, 43225, 55993, 73675, 103987, 136825, 191555, 199975, 279965, 519935, 727909, 957775, 1399825, 2599675, 3639545, 18197725]

約数ペア:

[(1, 18197725), (5, 3639545), (7, 2599675), (13, 1399825), (19, 957775), (25, 727909), (35, 519935), (65, 279965), (91, 199975), (95, 191555), (133, 136825), (175, 103987), (247, 73675), (325, 55993), (421, 43225), (455, 39995), (475, 38311), (665, 27365), (1235, 14735), (1729, 10525), (2105, 8645), (2275, 7999), (2947, 6175), (3325, 5473)]