21939515

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{113}}^1$

素因数の和:263

約数の個数: 32

約数和(自身を含む): 29877120

約数和(自身を除く): 7937605

約数列:

[1, 5, 13, 29, 65, 103, 113, 145, 377, 515, 565, 1339, 1469, 1885, 2987, 3277, 6695, 7345, 11639, 14935, 16385, 38831, 42601, 58195, 151307, 194155, 213005, 337531, 756535, 1687655, 4387903, 21939515]

約数ペア:

[(1, 21939515), (5, 4387903), (13, 1687655), (29, 756535), (65, 337531), (103, 213005), (113, 194155), (145, 151307), (377, 58195), (515, 42601), (565, 38831), (1339, 16385), (1469, 14935), (1885, 11639), (2987, 7345), (3277, 6695)]