21218935

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{1163}}^1$

素因数の和:1298

約数の個数: 16

約数和(自身を含む): 26399520

約数和(自身を除く): 5180585

約数列:

[1, 5, 41, 89, 205, 445, 1163, 3649, 5815, 18245, 47683, 103507, 238415, 517535, 4243787, 21218935]

約数ペア:

[(1, 21218935), (5, 4243787), (41, 517535), (89, 238415), (205, 103507), (445, 47683), (1163, 18245), (3649, 5815)]