21457528

素因数分解:

$2^3\times {\mathrm{23}}^1\times {\mathrm{277}}^1\times {\mathrm{421}}^1$

素因数の和:727

約数の個数: 32

約数和(自身を含む): 42233760

約数和(自身を除く): 20776232

約数列:

[1, 2, 4, 8, 23, 46, 92, 184, 277, 421, 554, 842, 1108, 1684, 2216, 3368, 6371, 9683, 12742, 19366, 25484, 38732, 50968, 77464, 116617, 233234, 466468, 932936, 2682191, 5364382, 10728764, 21457528]

約数ペア:

[(1, 21457528), (2, 10728764), (4, 5364382), (8, 2682191), (23, 932936), (46, 466468), (92, 233234), (184, 116617), (277, 77464), (421, 50968), (554, 38732), (842, 25484), (1108, 19366), (1684, 12742), (2216, 9683), (3368, 6371)]