20558816

素因数分解:

$2^5\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{223}}^1$

素因数の和:343

約数の個数: 48

約数和(自身を含む): 42223104

約数和(自身を除く): 21664288

約数列:

[1, 2, 4, 8, 16, 32, 43, 67, 86, 134, 172, 223, 268, 344, 446, 536, 688, 892, 1072, 1376, 1784, 2144, 2881, 3568, 5762, 7136, 9589, 11524, 14941, 19178, 23048, 29882, 38356, 46096, 59764, 76712, 92192, 119528, 153424, 239056, 306848, 478112, 642463, 1284926, 2569852, 5139704, 10279408, 20558816]

約数ペア:

[(1, 20558816), (2, 10279408), (4, 5139704), (8, 2569852), (16, 1284926), (32, 642463), (43, 478112), (67, 306848), (86, 239056), (134, 153424), (172, 119528), (223, 92192), (268, 76712), (344, 59764), (446, 46096), (536, 38356), (688, 29882), (892, 23048), (1072, 19178), (1376, 14941), (1784, 11524), (2144, 9589), (2881, 7136), (3568, 5762)]