398366980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{22921}}^1$

素因数の和:23020

約数の個数: 48

約数和(自身を含む): 924215040

約数和(自身を除く): 525848060

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 79, 110, 158, 220, 316, 395, 790, 869, 1580, 1738, 3476, 4345, 8690, 17380, 22921, 45842, 91684, 114605, 229210, 252131, 458420, 504262, 1008524, 1260655, 1810759, 2521310, 3621518, 5042620, 7243036, 9053795, 18107590, 19918349, 36215180, 39836698, 79673396, 99591745, 199183490, 398366980]

約数ペア:

[(1, 398366980), (2, 199183490), (4, 99591745), (5, 79673396), (10, 39836698), (11, 36215180), (20, 19918349), (22, 18107590), (44, 9053795), (55, 7243036), (79, 5042620), (110, 3621518), (158, 2521310), (220, 1810759), (316, 1260655), (395, 1008524), (790, 504262), (869, 458420), (1580, 252131), (1738, 229210), (3476, 114605), (4345, 91684), (8690, 45842), (17380, 22921)]