19805555

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{7349}}^1$

素因数の和:7379

約数の個数: 24

約数和(自身を含む): 30164400

約数和(自身を除く): 10358845

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 245, 385, 539, 2695, 7349, 36745, 51443, 80839, 257215, 360101, 404195, 565873, 1800505, 2829365, 3961111, 19805555]

約数ペア:

[(1, 19805555), (5, 3961111), (7, 2829365), (11, 1800505), (35, 565873), (49, 404195), (55, 360101), (77, 257215), (245, 80839), (385, 51443), (539, 36745), (2695, 7349)]