20998440

素因数分解:

$2^3\times 3^4\times 5^1\times {\mathrm{6481}}^1$

素因数の和:6504

約数の個数: 80

約数和(自身を含む): 70588980

約数和(自身を除く): 49590540

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 36, 40, 45, 54, 60, 72, 81, 90, 108, 120, 135, 162, 180, 216, 270, 324, 360, 405, 540, 648, 810, 1080, 1620, 3240, 6481, 12962, 19443, 25924, 32405, 38886, 51848, 58329, 64810, 77772, 97215, 116658, 129620, 155544, 174987, 194430, 233316, 259240, 291645, 349974, 388860, 466632, 524961, 583290, 699948, 777720, 874935, 1049922, 1166580, 1399896, 1749870, 2099844, 2333160, 2624805, 3499740, 4199688, 5249610, 6999480, 10499220, 20998440]

約数ペア:

[(1, 20998440), (2, 10499220), (3, 6999480), (4, 5249610), (5, 4199688), (6, 3499740), (8, 2624805), (9, 2333160), (10, 2099844), (12, 1749870), (15, 1399896), (18, 1166580), (20, 1049922), (24, 874935), (27, 777720), (30, 699948), (36, 583290), (40, 524961), (45, 466632), (54, 388860), (60, 349974), (72, 291645), (81, 259240), (90, 233316), (108, 194430), (120, 174987), (135, 155544), (162, 129620), (180, 116658), (216, 97215), (270, 77772), (324, 64810), (360, 58329), (405, 51848), (540, 38886), (648, 32405), (810, 25924), (1080, 19443), (1620, 12962), (3240, 6481)]