18528700

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:227

約数の個数: 72

約数和(自身を含む): 42775040

約数和(自身を除く): 24246340

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 43, 50, 62, 86, 100, 124, 139, 155, 172, 215, 278, 310, 430, 556, 620, 695, 775, 860, 1075, 1333, 1390, 1550, 2150, 2666, 2780, 3100, 3475, 4300, 4309, 5332, 5977, 6665, 6950, 8618, 11954, 13330, 13900, 17236, 21545, 23908, 26660, 29885, 33325, 43090, 59770, 66650, 86180, 107725, 119540, 133300, 149425, 185287, 215450, 298850, 370574, 430900, 597700, 741148, 926435, 1852870, 3705740, 4632175, 9264350, 18528700]

約数ペア:

[(1, 18528700), (2, 9264350), (4, 4632175), (5, 3705740), (10, 1852870), (20, 926435), (25, 741148), (31, 597700), (43, 430900), (50, 370574), (62, 298850), (86, 215450), (100, 185287), (124, 149425), (139, 133300), (155, 119540), (172, 107725), (215, 86180), (278, 66650), (310, 59770), (430, 43090), (556, 33325), (620, 29885), (695, 26660), (775, 23908), (860, 21545), (1075, 17236), (1333, 13900), (1390, 13330), (1550, 11954), (2150, 8618), (2666, 6950), (2780, 6665), (3100, 5977), (3475, 5332), (4300, 4309)]