21681550

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{499}}^1$

素因数の和:601

約数の個数: 48

約数和(自身を含む): 44640000

約数和(自身を除く): 22958450

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 79, 110, 158, 275, 395, 499, 550, 790, 869, 998, 1738, 1975, 2495, 3950, 4345, 4990, 5489, 8690, 10978, 12475, 21725, 24950, 27445, 39421, 43450, 54890, 78842, 137225, 197105, 274450, 394210, 433631, 867262, 985525, 1971050, 2168155, 4336310, 10840775, 21681550]

約数ペア:

[(1, 21681550), (2, 10840775), (5, 4336310), (10, 2168155), (11, 1971050), (22, 985525), (25, 867262), (50, 433631), (55, 394210), (79, 274450), (110, 197105), (158, 137225), (275, 78842), (395, 54890), (499, 43450), (550, 39421), (790, 27445), (869, 24950), (998, 21725), (1738, 12475), (1975, 10978), (2495, 8690), (3950, 5489), (4345, 4990)]