21072591

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{1607}}^1$

素因数の和:1691

約数の個数: 24

約数和(自身を含む): 32108544

約数和(自身を除く): 11035953

約数列:

[1, 3, 9, 31, 47, 93, 141, 279, 423, 1457, 1607, 4371, 4821, 13113, 14463, 49817, 75529, 149451, 226587, 448353, 679761, 2341399, 7024197, 21072591]

約数ペア:

[(1, 21072591), (3, 7024197), (9, 2341399), (31, 679761), (47, 448353), (93, 226587), (141, 149451), (279, 75529), (423, 49817), (1457, 14463), (1607, 13113), (4371, 4821)]