19857740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{881}}^1$

素因数の和:927

約数の個数: 72

約数和(自身を含む): 50676192

約数和(自身を除く): 30818452

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 49, 70, 92, 98, 115, 140, 161, 196, 230, 245, 322, 460, 490, 644, 805, 881, 980, 1127, 1610, 1762, 2254, 3220, 3524, 4405, 4508, 5635, 6167, 8810, 11270, 12334, 17620, 20263, 22540, 24668, 30835, 40526, 43169, 61670, 81052, 86338, 101315, 123340, 141841, 172676, 202630, 215845, 283682, 405260, 431690, 567364, 709205, 863380, 992887, 1418410, 1985774, 2836820, 3971548, 4964435, 9928870, 19857740]

約数ペア:

[(1, 19857740), (2, 9928870), (4, 4964435), (5, 3971548), (7, 2836820), (10, 1985774), (14, 1418410), (20, 992887), (23, 863380), (28, 709205), (35, 567364), (46, 431690), (49, 405260), (70, 283682), (92, 215845), (98, 202630), (115, 172676), (140, 141841), (161, 123340), (196, 101315), (230, 86338), (245, 81052), (322, 61670), (460, 43169), (490, 40526), (644, 30835), (805, 24668), (881, 22540), (980, 20263), (1127, 17620), (1610, 12334), (1762, 11270), (2254, 8810), (3220, 6167), (3524, 5635), (4405, 4508)]