20928100

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:245

約数の個数: 72

約数和(自身を含む): 48274688

約数和(自身を除く): 27346588

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 43, 50, 62, 86, 100, 124, 155, 157, 172, 215, 310, 314, 430, 620, 628, 775, 785, 860, 1075, 1333, 1550, 1570, 2150, 2666, 3100, 3140, 3925, 4300, 4867, 5332, 6665, 6751, 7850, 9734, 13330, 13502, 15700, 19468, 24335, 26660, 27004, 33325, 33755, 48670, 66650, 67510, 97340, 121675, 133300, 135020, 168775, 209281, 243350, 337550, 418562, 486700, 675100, 837124, 1046405, 2092810, 4185620, 5232025, 10464050, 20928100]

約数ペア:

[(1, 20928100), (2, 10464050), (4, 5232025), (5, 4185620), (10, 2092810), (20, 1046405), (25, 837124), (31, 675100), (43, 486700), (50, 418562), (62, 337550), (86, 243350), (100, 209281), (124, 168775), (155, 135020), (157, 133300), (172, 121675), (215, 97340), (310, 67510), (314, 66650), (430, 48670), (620, 33755), (628, 33325), (775, 27004), (785, 26660), (860, 24335), (1075, 19468), (1333, 15700), (1550, 13502), (1570, 13330), (2150, 9734), (2666, 7850), (3100, 6751), (3140, 6665), (3925, 5332), (4300, 4867)]