21487804

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{4643}}^1$

素因数の和:4749

約数の個数: 24

約数和(自身を含む): 40960080

約数和(自身を除く): 19472276

約数列:

[1, 2, 4, 13, 26, 52, 89, 178, 356, 1157, 2314, 4628, 4643, 9286, 18572, 60359, 120718, 241436, 413227, 826454, 1652908, 5371951, 10743902, 21487804]

約数ペア:

[(1, 21487804), (2, 10743902), (4, 5371951), (13, 1652908), (26, 826454), (52, 413227), (89, 241436), (178, 120718), (356, 60359), (1157, 18572), (2314, 9286), (4628, 4643)]