20681925

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:131

約数の個数: 72

約数和(自身を含む): 39184992

約数和(自身を除く): 18503067

約数列:

[1, 3, 5, 11, 15, 25, 33, 43, 53, 55, 75, 121, 129, 159, 165, 215, 265, 275, 363, 473, 583, 605, 645, 795, 825, 1075, 1325, 1419, 1749, 1815, 2279, 2365, 2915, 3025, 3225, 3975, 5203, 6413, 6837, 7095, 8745, 9075, 11395, 11825, 14575, 15609, 19239, 25069, 26015, 32065, 34185, 35475, 43725, 56975, 75207, 78045, 96195, 125345, 130075, 160325, 170925, 275759, 376035, 390225, 480975, 626725, 827277, 1378795, 1880175, 4136385, 6893975, 20681925]

約数ペア:

[(1, 20681925), (3, 6893975), (5, 4136385), (11, 1880175), (15, 1378795), (25, 827277), (33, 626725), (43, 480975), (53, 390225), (55, 376035), (75, 275759), (121, 170925), (129, 160325), (159, 130075), (165, 125345), (215, 96195), (265, 78045), (275, 75207), (363, 56975), (473, 43725), (583, 35475), (605, 34185), (645, 32065), (795, 26015), (825, 25069), (1075, 19239), (1325, 15609), (1419, 14575), (1749, 11825), (1815, 11395), (2279, 9075), (2365, 8745), (2915, 7095), (3025, 6837), (3225, 6413), (3975, 5203)]