21465910

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^2\times {\mathrm{271}}^1$

素因数の和:456

約数の個数: 24

約数和(自身を含む): 39221856

約数和(自身を除く): 17755946

約数列:

[1, 2, 5, 10, 89, 178, 271, 445, 542, 890, 1355, 2710, 7921, 15842, 24119, 39605, 48238, 79210, 120595, 241190, 2146591, 4293182, 10732955, 21465910]

約数ペア:

[(1, 21465910), (2, 10732955), (5, 4293182), (10, 2146591), (89, 241190), (178, 120595), (271, 79210), (445, 48238), (542, 39605), (890, 24119), (1355, 15842), (2710, 7921)]