20892320

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7681}}^1$

素因数の和:7713

約数の個数: 48

約数和(自身を含む): 52268328

約数和(自身を除く): 31376008

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7681, 15362, 30724, 38405, 61448, 76810, 122896, 130577, 153620, 245792, 261154, 307240, 522308, 614480, 652885, 1044616, 1228960, 1305770, 2089232, 2611540, 4178464, 5223080, 10446160, 20892320]

約数ペア:

[(1, 20892320), (2, 10446160), (4, 5223080), (5, 4178464), (8, 2611540), (10, 2089232), (16, 1305770), (17, 1228960), (20, 1044616), (32, 652885), (34, 614480), (40, 522308), (68, 307240), (80, 261154), (85, 245792), (136, 153620), (160, 130577), (170, 122896), (272, 76810), (340, 61448), (544, 38405), (680, 30724), (1360, 15362), (2720, 7681)]