20211376

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{1013}}^1$

素因数の和:1093

約数の個数: 40

約数和(自身を含む): 41492880

約数和(自身を除く): 21281504

約数列:

[1, 2, 4, 8, 16, 29, 43, 58, 86, 116, 172, 232, 344, 464, 688, 1013, 1247, 2026, 2494, 4052, 4988, 8104, 9976, 16208, 19952, 29377, 43559, 58754, 87118, 117508, 174236, 235016, 348472, 470032, 696944, 1263211, 2526422, 5052844, 10105688, 20211376]

約数ペア:

[(1, 20211376), (2, 10105688), (4, 5052844), (8, 2526422), (16, 1263211), (29, 696944), (43, 470032), (58, 348472), (86, 235016), (116, 174236), (172, 117508), (232, 87118), (344, 58754), (464, 43559), (688, 29377), (1013, 19952), (1247, 16208), (2026, 9976), (2494, 8104), (4052, 4988)]