20385440

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2963}}^1$

素因数の和:3021

約数の個数: 48

約数和(自身を含む): 49297248

約数和(自身を除く): 28911808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 160, 172, 215, 344, 430, 688, 860, 1376, 1720, 2963, 3440, 5926, 6880, 11852, 14815, 23704, 29630, 47408, 59260, 94816, 118520, 127409, 237040, 254818, 474080, 509636, 637045, 1019272, 1274090, 2038544, 2548180, 4077088, 5096360, 10192720, 20385440]

約数ペア:

[(1, 20385440), (2, 10192720), (4, 5096360), (5, 4077088), (8, 2548180), (10, 2038544), (16, 1274090), (20, 1019272), (32, 637045), (40, 509636), (43, 474080), (80, 254818), (86, 237040), (160, 127409), (172, 118520), (215, 94816), (344, 59260), (430, 47408), (688, 29630), (860, 23704), (1376, 14815), (1720, 11852), (2963, 6880), (3440, 5926)]