20088700

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{109}}^1$

素因数の和:239

約数の個数: 72

約数和(自身を含む): 46785200

約数和(自身を除く): 26696500

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 97, 100, 109, 190, 194, 218, 380, 388, 436, 475, 485, 545, 950, 970, 1090, 1843, 1900, 1940, 2071, 2180, 2425, 2725, 3686, 4142, 4850, 5450, 7372, 8284, 9215, 9700, 10355, 10573, 10900, 18430, 20710, 21146, 36860, 41420, 42292, 46075, 51775, 52865, 92150, 103550, 105730, 184300, 200887, 207100, 211460, 264325, 401774, 528650, 803548, 1004435, 1057300, 2008870, 4017740, 5022175, 10044350, 20088700]

約数ペア:

[(1, 20088700), (2, 10044350), (4, 5022175), (5, 4017740), (10, 2008870), (19, 1057300), (20, 1004435), (25, 803548), (38, 528650), (50, 401774), (76, 264325), (95, 211460), (97, 207100), (100, 200887), (109, 184300), (190, 105730), (194, 103550), (218, 92150), (380, 52865), (388, 51775), (436, 46075), (475, 42292), (485, 41420), (545, 36860), (950, 21146), (970, 20710), (1090, 18430), (1843, 10900), (1900, 10573), (1940, 10355), (2071, 9700), (2180, 9215), (2425, 8284), (2725, 7372), (3686, 5450), (4142, 4850)]