21490510

素因数分解:

$2^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{223}}^1\times {\mathrm{419}}^1$

素因数の和:672

約数の個数: 32

約数和(自身を含む): 40642560

約数和(自身を除く): 19152050

約数列:

[1, 2, 5, 10, 23, 46, 115, 223, 230, 419, 446, 838, 1115, 2095, 2230, 4190, 5129, 9637, 10258, 19274, 25645, 48185, 51290, 93437, 96370, 186874, 467185, 934370, 2149051, 4298102, 10745255, 21490510]

約数ペア:

[(1, 21490510), (2, 10745255), (5, 4298102), (10, 2149051), (23, 934370), (46, 467185), (115, 186874), (223, 96370), (230, 93437), (419, 51290), (446, 48185), (838, 25645), (1115, 19274), (2095, 10258), (2230, 9637), (4190, 5129)]