21379440

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{229}}^1\times {\mathrm{389}}^1$

素因数の和:634

約数の個数: 80

約数和(自身を含む): 66736800

約数和(自身を除く): 45357360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 229, 240, 389, 458, 687, 778, 916, 1145, 1167, 1374, 1556, 1832, 1945, 2290, 2334, 2748, 3112, 3435, 3664, 3890, 4580, 4668, 5496, 5835, 6224, 6870, 7780, 9160, 9336, 10992, 11670, 13740, 15560, 18320, 18672, 23340, 27480, 31120, 46680, 54960, 89081, 93360, 178162, 267243, 356324, 445405, 534486, 712648, 890810, 1068972, 1336215, 1425296, 1781620, 2137944, 2672430, 3563240, 4275888, 5344860, 7126480, 10689720, 21379440]

約数ペア:

[(1, 21379440), (2, 10689720), (3, 7126480), (4, 5344860), (5, 4275888), (6, 3563240), (8, 2672430), (10, 2137944), (12, 1781620), (15, 1425296), (16, 1336215), (20, 1068972), (24, 890810), (30, 712648), (40, 534486), (48, 445405), (60, 356324), (80, 267243), (120, 178162), (229, 93360), (240, 89081), (389, 54960), (458, 46680), (687, 31120), (778, 27480), (916, 23340), (1145, 18672), (1167, 18320), (1374, 15560), (1556, 13740), (1832, 11670), (1945, 10992), (2290, 9336), (2334, 9160), (2748, 7780), (3112, 6870), (3435, 6224), (3664, 5835), (3890, 5496), (4580, 4668)]