20835880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2357}}^1$

素因数の和:2398

約数の個数: 64

約数和(自身を含む): 53479440

約数和(自身を除く): 32643560

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1768, 2210, 2357, 4420, 4714, 8840, 9428, 11785, 18856, 23570, 30641, 40069, 47140, 61282, 80138, 94280, 122564, 153205, 160276, 200345, 245128, 306410, 320552, 400690, 520897, 612820, 801380, 1041794, 1225640, 1602760, 2083588, 2604485, 4167176, 5208970, 10417940, 20835880]

約数ペア:

[(1, 20835880), (2, 10417940), (4, 5208970), (5, 4167176), (8, 2604485), (10, 2083588), (13, 1602760), (17, 1225640), (20, 1041794), (26, 801380), (34, 612820), (40, 520897), (52, 400690), (65, 320552), (68, 306410), (85, 245128), (104, 200345), (130, 160276), (136, 153205), (170, 122564), (221, 94280), (260, 80138), (340, 61282), (442, 47140), (520, 40069), (680, 30641), (884, 23570), (1105, 18856), (1768, 11785), (2210, 9428), (2357, 8840), (4420, 4714)]