20816380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^2$

素因数の和:163

約数の個数: 72

約数和(自身を含む): 49970592

約数和(自身を除く): 29154212

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 46, 52, 59, 65, 92, 115, 118, 130, 230, 236, 260, 295, 299, 460, 590, 598, 767, 1180, 1196, 1357, 1495, 1534, 2714, 2990, 3068, 3481, 3835, 5428, 5980, 6785, 6962, 7670, 13570, 13924, 15340, 17405, 17641, 27140, 34810, 35282, 45253, 69620, 70564, 80063, 88205, 90506, 160126, 176410, 181012, 226265, 320252, 352820, 400315, 452530, 800630, 905060, 1040819, 1601260, 2081638, 4163276, 5204095, 10408190, 20816380]

約数ペア:

[(1, 20816380), (2, 10408190), (4, 5204095), (5, 4163276), (10, 2081638), (13, 1601260), (20, 1040819), (23, 905060), (26, 800630), (46, 452530), (52, 400315), (59, 352820), (65, 320252), (92, 226265), (115, 181012), (118, 176410), (130, 160126), (230, 90506), (236, 88205), (260, 80063), (295, 70564), (299, 69620), (460, 45253), (590, 35282), (598, 34810), (767, 27140), (1180, 17641), (1196, 17405), (1357, 15340), (1495, 13924), (1534, 13570), (2714, 7670), (2990, 6962), (3068, 6785), (3481, 5980), (3835, 5428)]