21663750

素因数分解:

$2^1\times 3^1\times 5^4\times {\mathrm{53}}^1\times {\mathrm{109}}^1$

素因数の和:187

約数の個数: 80

約数和(自身を含む): 55669680

約数和(自身を除く): 34005930

約数列:

[1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 53, 75, 106, 109, 125, 150, 159, 218, 250, 265, 318, 327, 375, 530, 545, 625, 654, 750, 795, 1090, 1250, 1325, 1590, 1635, 1875, 2650, 2725, 3270, 3750, 3975, 5450, 5777, 6625, 7950, 8175, 11554, 13250, 13625, 16350, 17331, 19875, 27250, 28885, 33125, 34662, 39750, 40875, 57770, 66250, 68125, 81750, 86655, 99375, 136250, 144425, 173310, 198750, 204375, 288850, 408750, 433275, 722125, 866550, 1444250, 2166375, 3610625, 4332750, 7221250, 10831875, 21663750]

約数ペア:

[(1, 21663750), (2, 10831875), (3, 7221250), (5, 4332750), (6, 3610625), (10, 2166375), (15, 1444250), (25, 866550), (30, 722125), (50, 433275), (53, 408750), (75, 288850), (106, 204375), (109, 198750), (125, 173310), (150, 144425), (159, 136250), (218, 99375), (250, 86655), (265, 81750), (318, 68125), (327, 66250), (375, 57770), (530, 40875), (545, 39750), (625, 34662), (654, 33125), (750, 28885), (795, 27250), (1090, 19875), (1250, 17331), (1325, 16350), (1590, 13625), (1635, 13250), (1875, 11554), (2650, 8175), (2725, 7950), (3270, 6625), (3750, 5777), (3975, 5450)]