20023420

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1\times {\mathrm{239}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 43545600

約数和(自身を除く): 23522180

約数列:

[1, 2, 4, 5, 10, 20, 59, 71, 118, 142, 236, 239, 284, 295, 355, 478, 590, 710, 956, 1180, 1195, 1420, 2390, 4189, 4780, 8378, 14101, 16756, 16969, 20945, 28202, 33938, 41890, 56404, 67876, 70505, 83780, 84845, 141010, 169690, 282020, 339380, 1001171, 2002342, 4004684, 5005855, 10011710, 20023420]

約数ペア:

[(1, 20023420), (2, 10011710), (4, 5005855), (5, 4004684), (10, 2002342), (20, 1001171), (59, 339380), (71, 282020), (118, 169690), (142, 141010), (236, 84845), (239, 83780), (284, 70505), (295, 67876), (355, 56404), (478, 41890), (590, 33938), (710, 28202), (956, 20945), (1180, 16969), (1195, 16756), (1420, 14101), (2390, 8378), (4189, 4780)]