21426460

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{337}}^1$

素因数の和:391

約数の個数: 72

約数和(自身を含む): 52298064

約数和(自身を除く): 30871604

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 289, 337, 340, 374, 578, 674, 748, 935, 1156, 1348, 1445, 1685, 1870, 2890, 3179, 3370, 3707, 3740, 5729, 5780, 6358, 6740, 7414, 11458, 12716, 14828, 15895, 18535, 22916, 28645, 31790, 37070, 57290, 63019, 63580, 74140, 97393, 114580, 126038, 194786, 252076, 315095, 389572, 486965, 630190, 973930, 1071323, 1260380, 1947860, 2142646, 4285292, 5356615, 10713230, 21426460]

約数ペア:

[(1, 21426460), (2, 10713230), (4, 5356615), (5, 4285292), (10, 2142646), (11, 1947860), (17, 1260380), (20, 1071323), (22, 973930), (34, 630190), (44, 486965), (55, 389572), (68, 315095), (85, 252076), (110, 194786), (170, 126038), (187, 114580), (220, 97393), (289, 74140), (337, 63580), (340, 63019), (374, 57290), (578, 37070), (674, 31790), (748, 28645), (935, 22916), (1156, 18535), (1348, 15895), (1445, 14828), (1685, 12716), (1870, 11458), (2890, 7414), (3179, 6740), (3370, 6358), (3707, 5780), (3740, 5729)]