21991640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{331}}^1$

素因数の和:504

約数の個数: 64

約数和(自身を含む): 54501120

約数和(自身を除く): 32509480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 151, 220, 302, 331, 440, 604, 662, 755, 1208, 1324, 1510, 1655, 1661, 2648, 3020, 3310, 3322, 3641, 6040, 6620, 6644, 7282, 8305, 13240, 13288, 14564, 16610, 18205, 29128, 33220, 36410, 49981, 66440, 72820, 99962, 145640, 199924, 249905, 399848, 499810, 549791, 999620, 1099582, 1999240, 2199164, 2748955, 4398328, 5497910, 10995820, 21991640]

約数ペア:

[(1, 21991640), (2, 10995820), (4, 5497910), (5, 4398328), (8, 2748955), (10, 2199164), (11, 1999240), (20, 1099582), (22, 999620), (40, 549791), (44, 499810), (55, 399848), (88, 249905), (110, 199924), (151, 145640), (220, 99962), (302, 72820), (331, 66440), (440, 49981), (604, 36410), (662, 33220), (755, 29128), (1208, 18205), (1324, 16610), (1510, 14564), (1655, 13288), (1661, 13240), (2648, 8305), (3020, 7282), (3310, 6644), (3322, 6620), (3641, 6040)]