20705220

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{12781}}^1$

素因数の和:12802

約数の個数: 60

約数和(自身を含む): 64958124

約数和(自身を除く): 44252904

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 270, 324, 405, 540, 810, 1620, 12781, 25562, 38343, 51124, 63905, 76686, 115029, 127810, 153372, 191715, 230058, 255620, 345087, 383430, 460116, 575145, 690174, 766860, 1035261, 1150290, 1380348, 1725435, 2070522, 2300580, 3450870, 4141044, 5176305, 6901740, 10352610, 20705220]

約数ペア:

[(1, 20705220), (2, 10352610), (3, 6901740), (4, 5176305), (5, 4141044), (6, 3450870), (9, 2300580), (10, 2070522), (12, 1725435), (15, 1380348), (18, 1150290), (20, 1035261), (27, 766860), (30, 690174), (36, 575145), (45, 460116), (54, 383430), (60, 345087), (81, 255620), (90, 230058), (108, 191715), (135, 153372), (162, 127810), (180, 115029), (270, 76686), (324, 63905), (405, 51124), (540, 38343), (810, 25562), (1620, 12781)]