18687968

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{167}}^1\times {\mathrm{269}}^1$

素因数の和:459

約数の個数: 48

約数和(自身を含む): 40007520

約数和(自身を除く): 21319552

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 167, 208, 269, 334, 416, 538, 668, 1076, 1336, 2152, 2171, 2672, 3497, 4304, 4342, 5344, 6994, 8608, 8684, 13988, 17368, 27976, 34736, 44923, 55952, 69472, 89846, 111904, 179692, 359384, 583999, 718768, 1167998, 1437536, 2335996, 4671992, 9343984, 18687968]

約数ペア:

[(1, 18687968), (2, 9343984), (4, 4671992), (8, 2335996), (13, 1437536), (16, 1167998), (26, 718768), (32, 583999), (52, 359384), (104, 179692), (167, 111904), (208, 89846), (269, 69472), (334, 55952), (416, 44923), (538, 34736), (668, 27976), (1076, 17368), (1336, 13988), (2152, 8684), (2171, 8608), (2672, 6994), (3497, 5344), (4304, 4342)]