21267415

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^2\times {\mathrm{239}}^1$

素因数の和:331

約数の個数: 24

約数和(自身を含む): 28365120

約数和(自身を除く): 7097705

約数列:

[1, 5, 13, 37, 65, 185, 239, 481, 1195, 1369, 2405, 3107, 6845, 8843, 15535, 17797, 44215, 88985, 114959, 327191, 574795, 1635955, 4253483, 21267415]

約数ペア:

[(1, 21267415), (5, 4253483), (13, 1635955), (37, 574795), (65, 327191), (185, 114959), (239, 88985), (481, 44215), (1195, 17797), (1369, 15535), (2405, 8843), (3107, 6845)]