21663475

素因数分解:

$5^2\times {\mathrm{47}}^1\times {\mathrm{103}}^1\times {\mathrm{179}}^1$

素因数の和:339

約数の個数: 24

約数和(自身を含む): 27855360

約数和(自身を除く): 6191885

約数列:

[1, 5, 25, 47, 103, 179, 235, 515, 895, 1175, 2575, 4475, 4841, 8413, 18437, 24205, 42065, 92185, 121025, 210325, 460925, 866539, 4332695, 21663475]

約数ペア:

[(1, 21663475), (5, 4332695), (25, 866539), (47, 460925), (103, 210325), (179, 121025), (235, 92185), (515, 42065), (895, 24205), (1175, 18437), (2575, 8413), (4475, 4841)]