21085116

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{281}}^1$

素因数の和:351

約数の個数: 72

約数和(自身を含む): 54908784

約数和(自身を除く): 33823668

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 37, 39, 52, 74, 78, 111, 148, 156, 169, 222, 281, 338, 444, 481, 507, 562, 676, 843, 962, 1014, 1124, 1443, 1686, 1924, 2028, 2886, 3372, 3653, 5772, 6253, 7306, 10397, 10959, 12506, 14612, 18759, 20794, 21918, 25012, 31191, 37518, 41588, 43836, 47489, 62382, 75036, 94978, 124764, 135161, 142467, 189956, 270322, 284934, 405483, 540644, 569868, 810966, 1621932, 1757093, 3514186, 5271279, 7028372, 10542558, 21085116]

約数ペア:

[(1, 21085116), (2, 10542558), (3, 7028372), (4, 5271279), (6, 3514186), (12, 1757093), (13, 1621932), (26, 810966), (37, 569868), (39, 540644), (52, 405483), (74, 284934), (78, 270322), (111, 189956), (148, 142467), (156, 135161), (169, 124764), (222, 94978), (281, 75036), (338, 62382), (444, 47489), (481, 43836), (507, 41588), (562, 37518), (676, 31191), (843, 25012), (962, 21918), (1014, 20794), (1124, 18759), (1443, 14612), (1686, 12506), (1924, 10959), (2028, 10397), (2886, 7306), (3372, 6253), (3653, 5772)]