20856790

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{1553}}^1$

素因数の和:1656

約数の個数: 32

約数和(自身を含む): 40279680

約数和(自身を除く): 19422890

約数列:

[1, 2, 5, 10, 17, 34, 79, 85, 158, 170, 395, 790, 1343, 1553, 2686, 3106, 6715, 7765, 13430, 15530, 26401, 52802, 122687, 132005, 245374, 264010, 613435, 1226870, 2085679, 4171358, 10428395, 20856790]

約数ペア:

[(1, 20856790), (2, 10428395), (5, 4171358), (10, 2085679), (17, 1226870), (34, 613435), (79, 264010), (85, 245374), (158, 132005), (170, 122687), (395, 52802), (790, 26401), (1343, 15530), (1553, 13430), (2686, 7765), (3106, 6715)]