21066535

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{401}}^1$

素因数の和:511

約数の個数: 32

約数和(自身を含む): 30873600

約数和(自身を除く): 9807065

約数列:

[1, 5, 7, 19, 35, 79, 95, 133, 395, 401, 553, 665, 1501, 2005, 2765, 2807, 7505, 7619, 10507, 14035, 31679, 38095, 52535, 53333, 158395, 221753, 266665, 601901, 1108765, 3009505, 4213307, 21066535]

約数ペア:

[(1, 21066535), (5, 4213307), (7, 3009505), (19, 1108765), (35, 601901), (79, 266665), (95, 221753), (133, 158395), (395, 53333), (401, 52535), (553, 38095), (665, 31679), (1501, 14035), (2005, 10507), (2765, 7619), (2807, 7505)]