21317160

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{443}}^1$

素因数の和:858

約数の個数: 64

約数和(自身を含む): 64255680

約数和(自身を除く): 42938520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 401, 443, 802, 886, 1203, 1329, 1604, 1772, 2005, 2215, 2406, 2658, 3208, 3544, 4010, 4430, 4812, 5316, 6015, 6645, 8020, 8860, 9624, 10632, 12030, 13290, 16040, 17720, 24060, 26580, 48120, 53160, 177643, 355286, 532929, 710572, 888215, 1065858, 1421144, 1776430, 2131716, 2664645, 3552860, 4263432, 5329290, 7105720, 10658580, 21317160]

約数ペア:

[(1, 21317160), (2, 10658580), (3, 7105720), (4, 5329290), (5, 4263432), (6, 3552860), (8, 2664645), (10, 2131716), (12, 1776430), (15, 1421144), (20, 1065858), (24, 888215), (30, 710572), (40, 532929), (60, 355286), (120, 177643), (401, 53160), (443, 48120), (802, 26580), (886, 24060), (1203, 17720), (1329, 16040), (1604, 13290), (1772, 12030), (2005, 10632), (2215, 9624), (2406, 8860), (2658, 8020), (3208, 6645), (3544, 6015), (4010, 5316), (4430, 4812)]