21755968

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{331}}^1$

素因数の和:435

約数の個数: 56

約数和(自身を含む): 47223680

約数和(自身を除く): 25467712

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 79, 104, 158, 208, 316, 331, 416, 632, 662, 832, 1027, 1264, 1324, 2054, 2528, 2648, 4108, 4303, 5056, 5296, 8216, 8606, 10592, 16432, 17212, 21184, 26149, 32864, 34424, 52298, 65728, 68848, 104596, 137696, 209192, 275392, 339937, 418384, 679874, 836768, 1359748, 1673536, 2719496, 5438992, 10877984, 21755968]

約数ペア:

[(1, 21755968), (2, 10877984), (4, 5438992), (8, 2719496), (13, 1673536), (16, 1359748), (26, 836768), (32, 679874), (52, 418384), (64, 339937), (79, 275392), (104, 209192), (158, 137696), (208, 104596), (316, 68848), (331, 65728), (416, 52298), (632, 34424), (662, 32864), (832, 26149), (1027, 21184), (1264, 17212), (1324, 16432), (2054, 10592), (2528, 8606), (2648, 8216), (4108, 5296), (4303, 5056)]