278939980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{43721}}^1$

素因数の和:43770

約数の個数: 48

約数和(自身を含む): 661076640

約数和(自身を除く): 382136660

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 29, 44, 55, 58, 110, 116, 145, 220, 290, 319, 580, 638, 1276, 1595, 3190, 6380, 43721, 87442, 174884, 218605, 437210, 480931, 874420, 961862, 1267909, 1923724, 2404655, 2535818, 4809310, 5071636, 6339545, 9618620, 12679090, 13946999, 25358180, 27893998, 55787996, 69734995, 139469990, 278939980]

約数ペア:

[(1, 278939980), (2, 139469990), (4, 69734995), (5, 55787996), (10, 27893998), (11, 25358180), (20, 13946999), (22, 12679090), (29, 9618620), (44, 6339545), (55, 5071636), (58, 4809310), (110, 2535818), (116, 2404655), (145, 1923724), (220, 1267909), (290, 961862), (319, 874420), (580, 480931), (638, 437210), (1276, 218605), (1595, 174884), (3190, 87442), (6380, 43721)]