399004540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{17957}}^1$

素因数の和:18078

約数の個数: 48

約数和(自身を含む): 923184864

約数和(自身を除く): 524180324

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 1010, 1111, 2020, 2222, 4444, 5555, 11110, 17957, 22220, 35914, 71828, 89785, 179570, 197527, 359140, 395054, 790108, 987635, 1813657, 1975270, 3627314, 3950540, 7254628, 9068285, 18136570, 19950227, 36273140, 39900454, 79800908, 99751135, 199502270, 399004540]

約数ペア:

[(1, 399004540), (2, 199502270), (4, 99751135), (5, 79800908), (10, 39900454), (11, 36273140), (20, 19950227), (22, 18136570), (44, 9068285), (55, 7254628), (101, 3950540), (110, 3627314), (202, 1975270), (220, 1813657), (404, 987635), (505, 790108), (1010, 395054), (1111, 359140), (2020, 197527), (2222, 179570), (4444, 89785), (5555, 71828), (11110, 35914), (17957, 22220)]