21237590

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{277}}^1$

素因数の和:353

約数の個数: 64

約数和(自身を含む): 45396288

約数和(自身を除く): 24158698

約数列:

[1, 2, 5, 10, 11, 17, 22, 34, 41, 55, 82, 85, 110, 170, 187, 205, 277, 374, 410, 451, 554, 697, 902, 935, 1385, 1394, 1870, 2255, 2770, 3047, 3485, 4510, 4709, 6094, 6970, 7667, 9418, 11357, 15235, 15334, 22714, 23545, 30470, 38335, 47090, 51799, 56785, 76670, 103598, 113570, 124927, 193069, 249854, 258995, 386138, 517990, 624635, 965345, 1249270, 1930690, 2123759, 4247518, 10618795, 21237590]

約数ペア:

[(1, 21237590), (2, 10618795), (5, 4247518), (10, 2123759), (11, 1930690), (17, 1249270), (22, 965345), (34, 624635), (41, 517990), (55, 386138), (82, 258995), (85, 249854), (110, 193069), (170, 124927), (187, 113570), (205, 103598), (277, 76670), (374, 56785), (410, 51799), (451, 47090), (554, 38335), (697, 30470), (902, 23545), (935, 22714), (1385, 15334), (1394, 15235), (1870, 11357), (2255, 9418), (2770, 7667), (3047, 6970), (3485, 6094), (4510, 4709)]