19865872

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{641}}^1$

素因数の和:811

約数の個数: 40

約数和(自身を含む): 41794200

約数和(自身を除く): 21928328

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 149, 208, 298, 596, 641, 1192, 1282, 1937, 2384, 2564, 3874, 5128, 7748, 8333, 10256, 15496, 16666, 30992, 33332, 66664, 95509, 133328, 191018, 382036, 764072, 1241617, 1528144, 2483234, 4966468, 9932936, 19865872]

約数ペア:

[(1, 19865872), (2, 9932936), (4, 4966468), (8, 2483234), (13, 1528144), (16, 1241617), (26, 764072), (52, 382036), (104, 191018), (149, 133328), (208, 95509), (298, 66664), (596, 33332), (641, 30992), (1192, 16666), (1282, 15496), (1937, 10256), (2384, 8333), (2564, 7748), (3874, 5128)]