21095470

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{389}}^1$

素因数の和:453

約数の個数: 64

約数和(自身を含む): 45489600

約数和(自身を除く): 24394130

約数列:

[1, 2, 5, 10, 11, 17, 22, 29, 34, 55, 58, 85, 110, 145, 170, 187, 290, 319, 374, 389, 493, 638, 778, 935, 986, 1595, 1870, 1945, 2465, 3190, 3890, 4279, 4930, 5423, 6613, 8558, 10846, 11281, 13226, 21395, 22562, 27115, 33065, 42790, 54230, 56405, 66130, 72743, 112810, 124091, 145486, 191777, 248182, 363715, 383554, 620455, 727430, 958885, 1240910, 1917770, 2109547, 4219094, 10547735, 21095470]

約数ペア:

[(1, 21095470), (2, 10547735), (5, 4219094), (10, 2109547), (11, 1917770), (17, 1240910), (22, 958885), (29, 727430), (34, 620455), (55, 383554), (58, 363715), (85, 248182), (110, 191777), (145, 145486), (170, 124091), (187, 112810), (290, 72743), (319, 66130), (374, 56405), (389, 54230), (493, 42790), (638, 33065), (778, 27115), (935, 22562), (986, 21395), (1595, 13226), (1870, 11281), (1945, 10846), (2465, 8558), (3190, 6613), (3890, 5423), (4279, 4930)]