17921841

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{223}}^1$

素因数の和:365

約数の個数: 32

約数和(自身を含む): 28385280

約数和(自身を除く): 10463439

約数列:

[1, 3, 7, 21, 43, 89, 129, 223, 267, 301, 623, 669, 903, 1561, 1869, 3827, 4683, 9589, 11481, 19847, 26789, 28767, 59541, 67123, 80367, 138929, 201369, 416787, 853421, 2560263, 5973947, 17921841]

約数ペア:

[(1, 17921841), (3, 5973947), (7, 2560263), (21, 853421), (43, 416787), (89, 201369), (129, 138929), (223, 80367), (267, 67123), (301, 59541), (623, 28767), (669, 26789), (903, 19847), (1561, 11481), (1869, 9589), (3827, 4683)]