21207400

素因数分解:

$2^3\times 5^2\times {\mathrm{107}}^1\times {\mathrm{991}}^1$

素因数の和:1114

約数の個数: 48

約数和(自身を含む): 49818240

約数和(自身を除く): 28610840

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 107, 200, 214, 428, 535, 856, 991, 1070, 1982, 2140, 2675, 3964, 4280, 4955, 5350, 7928, 9910, 10700, 19820, 21400, 24775, 39640, 49550, 99100, 106037, 198200, 212074, 424148, 530185, 848296, 1060370, 2120740, 2650925, 4241480, 5301850, 10603700, 21207400]

約数ペア:

[(1, 21207400), (2, 10603700), (4, 5301850), (5, 4241480), (8, 2650925), (10, 2120740), (20, 1060370), (25, 848296), (40, 530185), (50, 424148), (100, 212074), (107, 198200), (200, 106037), (214, 99100), (428, 49550), (535, 39640), (856, 24775), (991, 21400), (1070, 19820), (1982, 10700), (2140, 9910), (2675, 7928), (3964, 5350), (4280, 4955)]