20899376

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{821}}^1$

素因数の和:909

約数の個数: 40

約数和(自身を含む): 42605904

約数和(自身を除く): 21706528

約数列:

[1, 2, 4, 8, 16, 37, 43, 74, 86, 148, 172, 296, 344, 592, 688, 821, 1591, 1642, 3182, 3284, 6364, 6568, 12728, 13136, 25456, 30377, 35303, 60754, 70606, 121508, 141212, 243016, 282424, 486032, 564848, 1306211, 2612422, 5224844, 10449688, 20899376]

約数ペア:

[(1, 20899376), (2, 10449688), (4, 5224844), (8, 2612422), (16, 1306211), (37, 564848), (43, 486032), (74, 282424), (86, 243016), (148, 141212), (172, 121508), (296, 70606), (344, 60754), (592, 35303), (688, 30377), (821, 25456), (1591, 13136), (1642, 12728), (3182, 6568), (3284, 6364)]