21128050

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{317}}^1$

素因数の和:403

約数の個数: 48

約数和(自身を含む): 41640192

約数和(自身を除く): 20512142

約数列:

[1, 2, 5, 10, 25, 31, 43, 50, 62, 86, 155, 215, 310, 317, 430, 634, 775, 1075, 1333, 1550, 1585, 2150, 2666, 3170, 6665, 7925, 9827, 13330, 13631, 15850, 19654, 27262, 33325, 49135, 66650, 68155, 98270, 136310, 245675, 340775, 422561, 491350, 681550, 845122, 2112805, 4225610, 10564025, 21128050]

約数ペア:

[(1, 21128050), (2, 10564025), (5, 4225610), (10, 2112805), (25, 845122), (31, 681550), (43, 491350), (50, 422561), (62, 340775), (86, 245675), (155, 136310), (215, 98270), (310, 68155), (317, 66650), (430, 49135), (634, 33325), (775, 27262), (1075, 19654), (1333, 15850), (1550, 13631), (1585, 13330), (2150, 9827), (2666, 7925), (3170, 6665)]