20888540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{227}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 45505152

約数和(自身を除く): 24616612

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 107, 172, 214, 215, 227, 428, 430, 454, 535, 860, 908, 1070, 1135, 2140, 2270, 4540, 4601, 9202, 9761, 18404, 19522, 23005, 24289, 39044, 46010, 48578, 48805, 92020, 97156, 97610, 121445, 195220, 242890, 485780, 1044427, 2088854, 4177708, 5222135, 10444270, 20888540]

約数ペア:

[(1, 20888540), (2, 10444270), (4, 5222135), (5, 4177708), (10, 2088854), (20, 1044427), (43, 485780), (86, 242890), (107, 195220), (172, 121445), (214, 97610), (215, 97156), (227, 92020), (428, 48805), (430, 48578), (454, 46010), (535, 39044), (860, 24289), (908, 23005), (1070, 19522), (1135, 18404), (2140, 9761), (2270, 9202), (4540, 4601)]