20451080

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{587}}^1$

素因数の和:678

約数の個数: 64

約数和(自身を含む): 50379840

約数和(自身を除く): 29928760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 67, 104, 130, 134, 260, 268, 335, 520, 536, 587, 670, 871, 1174, 1340, 1742, 2348, 2680, 2935, 3484, 4355, 4696, 5870, 6968, 7631, 8710, 11740, 15262, 17420, 23480, 30524, 34840, 38155, 39329, 61048, 76310, 78658, 152620, 157316, 196645, 305240, 314632, 393290, 511277, 786580, 1022554, 1573160, 2045108, 2556385, 4090216, 5112770, 10225540, 20451080]

約数ペア:

[(1, 20451080), (2, 10225540), (4, 5112770), (5, 4090216), (8, 2556385), (10, 2045108), (13, 1573160), (20, 1022554), (26, 786580), (40, 511277), (52, 393290), (65, 314632), (67, 305240), (104, 196645), (130, 157316), (134, 152620), (260, 78658), (268, 76310), (335, 61048), (520, 39329), (536, 38155), (587, 34840), (670, 30524), (871, 23480), (1174, 17420), (1340, 15262), (1742, 11740), (2348, 8710), (2680, 7631), (2935, 6968), (3484, 5870), (4355, 4696)]