21508425

素因数分解:

$3^2\times 5^2\times {\mathrm{109}}^1\times {\mathrm{877}}^1$

素因数の和:1002

約数の個数: 36

約数和(自身を含む): 38921740

約数和(自身を除く): 17413315

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 109, 225, 327, 545, 877, 981, 1635, 2631, 2725, 4385, 4905, 7893, 8175, 13155, 21925, 24525, 39465, 65775, 95593, 197325, 286779, 477965, 860337, 1433895, 2389825, 4301685, 7169475, 21508425]

約数ペア:

[(1, 21508425), (3, 7169475), (5, 4301685), (9, 2389825), (15, 1433895), (25, 860337), (45, 477965), (75, 286779), (109, 197325), (225, 95593), (327, 65775), (545, 39465), (877, 24525), (981, 21925), (1635, 13155), (2631, 8175), (2725, 7893), (4385, 4905)]