18741728

素因数分解:

$2^5\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1$

素因数の和:267

約数の個数: 48

約数和(自身を含む): 38265696

約数和(自身を除く): 19523968

約数列:

[1, 2, 4, 8, 16, 32, 71, 73, 113, 142, 146, 226, 284, 292, 452, 568, 584, 904, 1136, 1168, 1808, 2272, 2336, 3616, 5183, 8023, 8249, 10366, 16046, 16498, 20732, 32092, 32996, 41464, 64184, 65992, 82928, 128368, 131984, 165856, 256736, 263968, 585679, 1171358, 2342716, 4685432, 9370864, 18741728]

約数ペア:

[(1, 18741728), (2, 9370864), (4, 4685432), (8, 2342716), (16, 1171358), (32, 585679), (71, 263968), (73, 256736), (113, 165856), (142, 131984), (146, 128368), (226, 82928), (284, 65992), (292, 64184), (452, 41464), (568, 32996), (584, 32092), (904, 20732), (1136, 16498), (1168, 16046), (1808, 10366), (2272, 8249), (2336, 8023), (3616, 5183)]