21397904

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{121579}}^1$

素因数の和:121598

約数の個数: 20

約数和(自身を含む): 45227760

約数和(自身を除く): 23829856

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 121579, 243158, 486316, 972632, 1337369, 1945264, 2674738, 5349476, 10698952, 21397904]

約数ペア:

[(1, 21397904), (2, 10698952), (4, 5349476), (8, 2674738), (11, 1945264), (16, 1337369), (22, 972632), (44, 486316), (88, 243158), (176, 121579)]