21221512

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{419}}^1\times {\mathrm{487}}^1$

素因数の和:925

約数の個数: 32

約数和(自身を含む): 43041600

約数和(自身を除く): 21820088

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 419, 487, 838, 974, 1676, 1948, 3352, 3896, 5447, 6331, 10894, 12662, 21788, 25324, 43576, 50648, 204053, 408106, 816212, 1632424, 2652689, 5305378, 10610756, 21221512]

約数ペア:

[(1, 21221512), (2, 10610756), (4, 5305378), (8, 2652689), (13, 1632424), (26, 816212), (52, 408106), (104, 204053), (419, 50648), (487, 43576), (838, 25324), (974, 21788), (1676, 12662), (1948, 10894), (3352, 6331), (3896, 5447)]