19854980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{2539}}^1$

素因数の和:2588

約数の個数: 48

約数和(自身を含む): 46085760

約数和(自身を除く): 26230780

約数列:

[1, 2, 4, 5, 10, 17, 20, 23, 34, 46, 68, 85, 92, 115, 170, 230, 340, 391, 460, 782, 1564, 1955, 2539, 3910, 5078, 7820, 10156, 12695, 25390, 43163, 50780, 58397, 86326, 116794, 172652, 215815, 233588, 291985, 431630, 583970, 863260, 992749, 1167940, 1985498, 3970996, 4963745, 9927490, 19854980]

約数ペア:

[(1, 19854980), (2, 9927490), (4, 4963745), (5, 3970996), (10, 1985498), (17, 1167940), (20, 992749), (23, 863260), (34, 583970), (46, 431630), (68, 291985), (85, 233588), (92, 215815), (115, 172652), (170, 116794), (230, 86326), (340, 58397), (391, 50780), (460, 43163), (782, 25390), (1564, 12695), (1955, 10156), (2539, 7820), (3910, 5078)]