19719975

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:129

約数の個数: 72

約数和(自身を含む): 37403856

約数和(自身を除く): 17683881

約数列:

[1, 3, 5, 11, 15, 25, 33, 41, 53, 55, 75, 121, 123, 159, 165, 205, 265, 275, 363, 451, 583, 605, 615, 795, 825, 1025, 1325, 1353, 1749, 1815, 2173, 2255, 2915, 3025, 3075, 3975, 4961, 6413, 6519, 6765, 8745, 9075, 10865, 11275, 14575, 14883, 19239, 23903, 24805, 32065, 32595, 33825, 43725, 54325, 71709, 74415, 96195, 119515, 124025, 160325, 162975, 262933, 358545, 372075, 480975, 597575, 788799, 1314665, 1792725, 3943995, 6573325, 19719975]

約数ペア:

[(1, 19719975), (3, 6573325), (5, 3943995), (11, 1792725), (15, 1314665), (25, 788799), (33, 597575), (41, 480975), (53, 372075), (55, 358545), (75, 262933), (121, 162975), (123, 160325), (159, 124025), (165, 119515), (205, 96195), (265, 74415), (275, 71709), (363, 54325), (451, 43725), (583, 33825), (605, 32595), (615, 32065), (795, 24805), (825, 23903), (1025, 19239), (1325, 14883), (1353, 14575), (1749, 11275), (1815, 10865), (2173, 9075), (2255, 8745), (2915, 6765), (3025, 6519), (3075, 6413), (3975, 4961)]