21290580

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{443}}^1$

素因数の和:550

約数の個数: 96

約数和(自身を含む): 67132800

約数和(自身を除く): 45842220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 89, 90, 108, 135, 178, 180, 267, 270, 356, 443, 445, 534, 540, 801, 886, 890, 1068, 1329, 1335, 1602, 1772, 1780, 2215, 2403, 2658, 2670, 3204, 3987, 4005, 4430, 4806, 5316, 5340, 6645, 7974, 8010, 8860, 9612, 11961, 12015, 13290, 15948, 16020, 19935, 23922, 24030, 26580, 39427, 39870, 47844, 48060, 59805, 78854, 79740, 118281, 119610, 157708, 197135, 236562, 239220, 354843, 394270, 473124, 591405, 709686, 788540, 1064529, 1182810, 1419372, 1774215, 2129058, 2365620, 3548430, 4258116, 5322645, 7096860, 10645290, 21290580]

約数ペア:

[(1, 21290580), (2, 10645290), (3, 7096860), (4, 5322645), (5, 4258116), (6, 3548430), (9, 2365620), (10, 2129058), (12, 1774215), (15, 1419372), (18, 1182810), (20, 1064529), (27, 788540), (30, 709686), (36, 591405), (45, 473124), (54, 394270), (60, 354843), (89, 239220), (90, 236562), (108, 197135), (135, 157708), (178, 119610), (180, 118281), (267, 79740), (270, 78854), (356, 59805), (443, 48060), (445, 47844), (534, 39870), (540, 39427), (801, 26580), (886, 24030), (890, 23922), (1068, 19935), (1329, 16020), (1335, 15948), (1602, 13290), (1772, 12015), (1780, 11961), (2215, 9612), (2403, 8860), (2658, 8010), (2670, 7974), (3204, 6645), (3987, 5340), (4005, 5316), (4430, 4806)]