20912720

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15377}}^1$

素因数の和:15407

約数の個数: 40

約数和(自身を含む): 51485544

約数和(自身を除く): 30572824

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15377, 30754, 61508, 76885, 123016, 153770, 246032, 261409, 307540, 522818, 615080, 1045636, 1230160, 1307045, 2091272, 2614090, 4182544, 5228180, 10456360, 20912720]

約数ペア:

[(1, 20912720), (2, 10456360), (4, 5228180), (5, 4182544), (8, 2614090), (10, 2091272), (16, 1307045), (17, 1230160), (20, 1045636), (34, 615080), (40, 522818), (68, 307540), (80, 261409), (85, 246032), (136, 153770), (170, 123016), (272, 76885), (340, 61508), (680, 30754), (1360, 15377)]