21212588

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{6491}}^1$

素因数の和:6557

約数の個数: 24

約数和(自身を含む): 39990720

約数和(自身を除く): 18778132

約数列:

[1, 2, 4, 19, 38, 43, 76, 86, 172, 817, 1634, 3268, 6491, 12982, 25964, 123329, 246658, 279113, 493316, 558226, 1116452, 5303147, 10606294, 21212588]

約数ペア:

[(1, 21212588), (2, 10606294), (4, 5303147), (19, 1116452), (38, 558226), (43, 493316), (76, 279113), (86, 246658), (172, 123329), (817, 25964), (1634, 12982), (3268, 6491)]