21302540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{2579}}^1$

素因数の和:2654

約数の個数: 48

約数和(自身を含む): 52012800

約数和(自身を除く): 30710260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 59, 70, 118, 140, 236, 295, 413, 590, 826, 1180, 1652, 2065, 2579, 4130, 5158, 8260, 10316, 12895, 18053, 25790, 36106, 51580, 72212, 90265, 152161, 180530, 304322, 361060, 608644, 760805, 1065127, 1521610, 2130254, 3043220, 4260508, 5325635, 10651270, 21302540]

約数ペア:

[(1, 21302540), (2, 10651270), (4, 5325635), (5, 4260508), (7, 3043220), (10, 2130254), (14, 1521610), (20, 1065127), (28, 760805), (35, 608644), (59, 361060), (70, 304322), (118, 180530), (140, 152161), (236, 90265), (295, 72212), (413, 51580), (590, 36106), (826, 25790), (1180, 18053), (1652, 12895), (2065, 10316), (2579, 8260), (4130, 5158)]