21420336

素因数分解:

$2^4\times 3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{1723}}^1$

素因数の和:1778

約数の個数: 80

約数和(自身を含む): 64987904

約数和(自身を除く): 43567568

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 37, 42, 48, 56, 74, 84, 111, 112, 148, 168, 222, 259, 296, 336, 444, 518, 592, 777, 888, 1036, 1554, 1723, 1776, 2072, 3108, 3446, 4144, 5169, 6216, 6892, 10338, 12061, 12432, 13784, 20676, 24122, 27568, 36183, 41352, 48244, 63751, 72366, 82704, 96488, 127502, 144732, 191253, 192976, 255004, 289464, 382506, 446257, 510008, 578928, 765012, 892514, 1020016, 1338771, 1530024, 1785028, 2677542, 3060048, 3570056, 5355084, 7140112, 10710168, 21420336]

約数ペア:

[(1, 21420336), (2, 10710168), (3, 7140112), (4, 5355084), (6, 3570056), (7, 3060048), (8, 2677542), (12, 1785028), (14, 1530024), (16, 1338771), (21, 1020016), (24, 892514), (28, 765012), (37, 578928), (42, 510008), (48, 446257), (56, 382506), (74, 289464), (84, 255004), (111, 192976), (112, 191253), (148, 144732), (168, 127502), (222, 96488), (259, 82704), (296, 72366), (336, 63751), (444, 48244), (518, 41352), (592, 36183), (777, 27568), (888, 24122), (1036, 20676), (1554, 13784), (1723, 12432), (1776, 12061), (2072, 10338), (3108, 6892), (3446, 6216), (4144, 5169)]