21153740

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14897}}^1$

素因数の和:14977

約数の個数: 24

約数和(自身を含む): 45051552

約数和(自身を除く): 23897812

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14897, 29794, 59588, 74485, 148970, 297940, 1057687, 2115374, 4230748, 5288435, 10576870, 21153740]

約数ペア:

[(1, 21153740), (2, 10576870), (4, 5288435), (5, 4230748), (10, 2115374), (20, 1057687), (71, 297940), (142, 148970), (284, 74485), (355, 59588), (710, 29794), (1420, 14897)]