21061905

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{1489}}^1$

素因数の和:1561

約数の個数: 32

約数和(自身を含む): 36046080

約数和(自身を除く): 14984175

約数列:

[1, 3, 5, 15, 23, 41, 69, 115, 123, 205, 345, 615, 943, 1489, 2829, 4467, 4715, 7445, 14145, 22335, 34247, 61049, 102741, 171235, 183147, 305245, 513705, 915735, 1404127, 4212381, 7020635, 21061905]

約数ペア:

[(1, 21061905), (3, 7020635), (5, 4212381), (15, 1404127), (23, 915735), (41, 513705), (69, 305245), (115, 183147), (123, 171235), (205, 102741), (345, 61049), (615, 34247), (943, 22335), (1489, 14145), (2829, 7445), (4467, 4715)]