21905820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{929}}^1$

素因数の和:1075

約数の個数: 72

約数和(自身を含む): 67026960

約数和(自身を除く): 45121140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 131, 180, 262, 393, 524, 655, 786, 929, 1179, 1310, 1572, 1858, 1965, 2358, 2620, 2787, 3716, 3930, 4645, 4716, 5574, 5895, 7860, 8361, 9290, 11148, 11790, 13935, 16722, 18580, 23580, 27870, 33444, 41805, 55740, 83610, 121699, 167220, 243398, 365097, 486796, 608495, 730194, 1095291, 1216990, 1460388, 1825485, 2190582, 2433980, 3650970, 4381164, 5476455, 7301940, 10952910, 21905820]

約数ペア:

[(1, 21905820), (2, 10952910), (3, 7301940), (4, 5476455), (5, 4381164), (6, 3650970), (9, 2433980), (10, 2190582), (12, 1825485), (15, 1460388), (18, 1216990), (20, 1095291), (30, 730194), (36, 608495), (45, 486796), (60, 365097), (90, 243398), (131, 167220), (180, 121699), (262, 83610), (393, 55740), (524, 41805), (655, 33444), (786, 27870), (929, 23580), (1179, 18580), (1310, 16722), (1572, 13935), (1858, 11790), (1965, 11148), (2358, 9290), (2620, 8361), (2787, 7860), (3716, 5895), (3930, 5574), (4645, 4716)]