19868750

素因数分解:

$2^1\times 5^5\times {\mathrm{11}}^1\times {\mathrm{17}}^2$

素因数の和:72

約数の個数: 72

約数和(自身を含む): 43169112

約数和(自身を除く): 23300362

約数列:

[1, 2, 5, 10, 11, 17, 22, 25, 34, 50, 55, 85, 110, 125, 170, 187, 250, 275, 289, 374, 425, 550, 578, 625, 850, 935, 1250, 1375, 1445, 1870, 2125, 2750, 2890, 3125, 3179, 4250, 4675, 6250, 6358, 6875, 7225, 9350, 10625, 13750, 14450, 15895, 21250, 23375, 31790, 34375, 36125, 46750, 53125, 68750, 72250, 79475, 106250, 116875, 158950, 180625, 233750, 361250, 397375, 584375, 794750, 903125, 1168750, 1806250, 1986875, 3973750, 9934375, 19868750]

約数ペア:

[(1, 19868750), (2, 9934375), (5, 3973750), (10, 1986875), (11, 1806250), (17, 1168750), (22, 903125), (25, 794750), (34, 584375), (50, 397375), (55, 361250), (85, 233750), (110, 180625), (125, 158950), (170, 116875), (187, 106250), (250, 79475), (275, 72250), (289, 68750), (374, 53125), (425, 46750), (550, 36125), (578, 34375), (625, 31790), (850, 23375), (935, 21250), (1250, 15895), (1375, 14450), (1445, 13750), (1870, 10625), (2125, 9350), (2750, 7225), (2890, 6875), (3125, 6358), (3179, 6250), (4250, 4675)]