1620720980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{227}}^1\times {\mathrm{8707}}^1$

素因数の和:8984

約数の個数: 48

約数和(自身を含む): 3502287936

約数和(自身を除く): 1881566956

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 227, 410, 454, 820, 908, 1135, 2270, 4540, 8707, 9307, 17414, 18614, 34828, 37228, 43535, 46535, 87070, 93070, 174140, 186140, 356987, 713974, 1427948, 1784935, 1976489, 3569870, 3952978, 7139740, 7905956, 9882445, 19764890, 39529780, 81036049, 162072098, 324144196, 405180245, 810360490, 1620720980]

約数ペア:

[(1, 1620720980), (2, 810360490), (4, 405180245), (5, 324144196), (10, 162072098), (20, 81036049), (41, 39529780), (82, 19764890), (164, 9882445), (205, 7905956), (227, 7139740), (410, 3952978), (454, 3569870), (820, 1976489), (908, 1784935), (1135, 1427948), (2270, 713974), (4540, 356987), (8707, 186140), (9307, 174140), (17414, 93070), (18614, 87070), (34828, 46535), (37228, 43535)]