21787875

素因数分解:

$3^2\times 5^3\times {\mathrm{107}}^1\times {\mathrm{181}}^1$

素因数の和:309

約数の個数: 48

約数和(自身を含む): 39862368

約数和(自身を除く): 18074493

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 107, 125, 181, 225, 321, 375, 535, 543, 905, 963, 1125, 1605, 1629, 2675, 2715, 4525, 4815, 8025, 8145, 13375, 13575, 19367, 22625, 24075, 40125, 40725, 58101, 67875, 96835, 120375, 174303, 203625, 290505, 484175, 871515, 1452525, 2420875, 4357575, 7262625, 21787875]

約数ペア:

[(1, 21787875), (3, 7262625), (5, 4357575), (9, 2420875), (15, 1452525), (25, 871515), (45, 484175), (75, 290505), (107, 203625), (125, 174303), (181, 120375), (225, 96835), (321, 67875), (375, 58101), (535, 40725), (543, 40125), (905, 24075), (963, 22625), (1125, 19367), (1605, 13575), (1629, 13375), (2675, 8145), (2715, 8025), (4525, 4815)]