21459375

素因数分解:

$3^2\times 5^5\times 7^1\times {\mathrm{109}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 44684640

約数和(自身を除く): 23225265

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 45, 63, 75, 105, 109, 125, 175, 225, 315, 327, 375, 525, 545, 625, 763, 875, 981, 1125, 1575, 1635, 1875, 2289, 2625, 2725, 3125, 3815, 4375, 4905, 5625, 6867, 7875, 8175, 9375, 11445, 13125, 13625, 19075, 21875, 24525, 28125, 34335, 39375, 40875, 57225, 65625, 68125, 95375, 122625, 171675, 196875, 204375, 286125, 340625, 476875, 613125, 858375, 1021875, 1430625, 2384375, 3065625, 4291875, 7153125, 21459375]

約数ペア:

[(1, 21459375), (3, 7153125), (5, 4291875), (7, 3065625), (9, 2384375), (15, 1430625), (21, 1021875), (25, 858375), (35, 613125), (45, 476875), (63, 340625), (75, 286125), (105, 204375), (109, 196875), (125, 171675), (175, 122625), (225, 95375), (315, 68125), (327, 65625), (375, 57225), (525, 40875), (545, 39375), (625, 34335), (763, 28125), (875, 24525), (981, 21875), (1125, 19075), (1575, 13625), (1635, 13125), (1875, 11445), (2289, 9375), (2625, 8175), (2725, 7875), (3125, 6867), (3815, 5625), (4375, 4905)]