21729915

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{421}}^1$

素因数の和:500

約数の個数: 48

約数和(自身を含む): 40025856

約数和(自身を除く): 18295941

約数列:

[1, 3, 5, 9, 15, 31, 37, 45, 93, 111, 155, 185, 279, 333, 421, 465, 555, 1147, 1263, 1395, 1665, 2105, 3441, 3789, 5735, 6315, 10323, 13051, 15577, 17205, 18945, 39153, 46731, 51615, 65255, 77885, 117459, 140193, 195765, 233655, 482887, 587295, 700965, 1448661, 2414435, 4345983, 7243305, 21729915]

約数ペア:

[(1, 21729915), (3, 7243305), (5, 4345983), (9, 2414435), (15, 1448661), (31, 700965), (37, 587295), (45, 482887), (93, 233655), (111, 195765), (155, 140193), (185, 117459), (279, 77885), (333, 65255), (421, 51615), (465, 46731), (555, 39153), (1147, 18945), (1263, 17205), (1395, 15577), (1665, 13051), (2105, 10323), (3441, 6315), (3789, 5735)]