20977875

素因数分解:

$3^2\times 5^3\times {\mathrm{29}}^1\times {\mathrm{643}}^1$

素因数の和:693

約数の個数: 48

約数和(自身を含む): 39180960

約数和(自身を除く): 18203085

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 125, 145, 225, 261, 375, 435, 643, 725, 1125, 1305, 1929, 2175, 3215, 3625, 5787, 6525, 9645, 10875, 16075, 18647, 28935, 32625, 48225, 55941, 80375, 93235, 144675, 167823, 241125, 279705, 466175, 723375, 839115, 1398525, 2330875, 4195575, 6992625, 20977875]

約数ペア:

[(1, 20977875), (3, 6992625), (5, 4195575), (9, 2330875), (15, 1398525), (25, 839115), (29, 723375), (45, 466175), (75, 279705), (87, 241125), (125, 167823), (145, 144675), (225, 93235), (261, 80375), (375, 55941), (435, 48225), (643, 32625), (725, 28935), (1125, 18647), (1305, 16075), (1929, 10875), (2175, 9645), (3215, 6525), (3625, 5787)]