21078640

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1409}}^1$

素因数の和:1450

約数の個数: 80

約数和(自身を含む): 56648160

約数和(自身を除く): 35569520

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 34, 40, 44, 55, 68, 80, 85, 88, 110, 136, 170, 176, 187, 220, 272, 340, 374, 440, 680, 748, 880, 935, 1360, 1409, 1496, 1870, 2818, 2992, 3740, 5636, 7045, 7480, 11272, 14090, 14960, 15499, 22544, 23953, 28180, 30998, 47906, 56360, 61996, 77495, 95812, 112720, 119765, 123992, 154990, 191624, 239530, 247984, 263483, 309980, 383248, 479060, 526966, 619960, 958120, 1053932, 1239920, 1317415, 1916240, 2107864, 2634830, 4215728, 5269660, 10539320, 21078640]

約数ペア:

[(1, 21078640), (2, 10539320), (4, 5269660), (5, 4215728), (8, 2634830), (10, 2107864), (11, 1916240), (16, 1317415), (17, 1239920), (20, 1053932), (22, 958120), (34, 619960), (40, 526966), (44, 479060), (55, 383248), (68, 309980), (80, 263483), (85, 247984), (88, 239530), (110, 191624), (136, 154990), (170, 123992), (176, 119765), (187, 112720), (220, 95812), (272, 77495), (340, 61996), (374, 56360), (440, 47906), (680, 30998), (748, 28180), (880, 23953), (935, 22544), (1360, 15499), (1409, 14960), (1496, 14090), (1870, 11272), (2818, 7480), (2992, 7045), (3740, 5636)]