19389980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1\times {\mathrm{331}}^1$

素因数の和:470

約数の個数: 48

約数和(自身を含む): 42668640

約数和(自身を除く): 23278660

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 101, 116, 145, 202, 290, 331, 404, 505, 580, 662, 1010, 1324, 1655, 2020, 2929, 3310, 5858, 6620, 9599, 11716, 14645, 19198, 29290, 33431, 38396, 47995, 58580, 66862, 95990, 133724, 167155, 191980, 334310, 668620, 969499, 1938998, 3877996, 4847495, 9694990, 19389980]

約数ペア:

[(1, 19389980), (2, 9694990), (4, 4847495), (5, 3877996), (10, 1938998), (20, 969499), (29, 668620), (58, 334310), (101, 191980), (116, 167155), (145, 133724), (202, 95990), (290, 66862), (331, 58580), (404, 47995), (505, 38396), (580, 33431), (662, 29290), (1010, 19198), (1324, 14645), (1655, 11716), (2020, 9599), (2929, 6620), (3310, 5858)]