20681180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4679}}^1$

素因数の和:4718

約数の個数: 48

約数和(自身を含む): 49533120

約数和(自身を除く): 28851940

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4679, 9358, 18716, 23395, 46790, 60827, 79543, 93580, 121654, 159086, 243308, 304135, 318172, 397715, 608270, 795430, 1034059, 1216540, 1590860, 2068118, 4136236, 5170295, 10340590, 20681180]

約数ペア:

[(1, 20681180), (2, 10340590), (4, 5170295), (5, 4136236), (10, 2068118), (13, 1590860), (17, 1216540), (20, 1034059), (26, 795430), (34, 608270), (52, 397715), (65, 318172), (68, 304135), (85, 243308), (130, 159086), (170, 121654), (221, 93580), (260, 79543), (340, 60827), (442, 46790), (884, 23395), (1105, 18716), (2210, 9358), (4420, 4679)]