21540615

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{4969}}^1$

素因数の和:5011

約数の個数: 24

約数和(自身を含む): 36618960

約数和(自身を除く): 15078345

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 289, 867, 1445, 4335, 4969, 14907, 24845, 74535, 84473, 253419, 422365, 1267095, 1436041, 4308123, 7180205, 21540615]

約数ペア:

[(1, 21540615), (3, 7180205), (5, 4308123), (15, 1436041), (17, 1267095), (51, 422365), (85, 253419), (255, 84473), (289, 74535), (867, 24845), (1445, 14907), (4335, 4969)]