21513947

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{541}}^1$

素因数の和:603

約数の個数: 32

約数和(自身を含む): 29137920

約数和(自身を除く): 7623973

約数列:

[1, 7, 13, 19, 23, 91, 133, 161, 247, 299, 437, 541, 1729, 2093, 3059, 3787, 5681, 7033, 10279, 12443, 39767, 49231, 71953, 87101, 133627, 161759, 236417, 935389, 1132313, 1654919, 3073421, 21513947]

約数ペア:

[(1, 21513947), (7, 3073421), (13, 1654919), (19, 1132313), (23, 935389), (91, 236417), (133, 161759), (161, 133627), (247, 87101), (299, 71953), (437, 49231), (541, 39767), (1729, 12443), (2093, 10279), (3059, 7033), (3787, 5681)]