21876875

素因数分解:

$5^4\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:137

約数の個数: 40

約数和(自身を含む): 30365280

約数和(自身を除く): 8488405

約数列:

[1, 5, 17, 25, 29, 71, 85, 125, 145, 355, 425, 493, 625, 725, 1207, 1775, 2059, 2125, 2465, 3625, 6035, 8875, 10295, 10625, 12325, 18125, 30175, 35003, 44375, 51475, 61625, 150875, 175015, 257375, 308125, 754375, 875075, 1286875, 4375375, 21876875]

約数ペア:

[(1, 21876875), (5, 4375375), (17, 1286875), (25, 875075), (29, 754375), (71, 308125), (85, 257375), (125, 175015), (145, 150875), (355, 61625), (425, 51475), (493, 44375), (625, 35003), (725, 30175), (1207, 18125), (1775, 12325), (2059, 10625), (2125, 10295), (2465, 8875), (3625, 6035)]