19904780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1069}}^1$

素因数の和:1111

約数の個数: 72

約数和(自身を含む): 51231600

約数和(自身を除く): 31326820

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 49, 70, 76, 95, 98, 133, 140, 190, 196, 245, 266, 380, 490, 532, 665, 931, 980, 1069, 1330, 1862, 2138, 2660, 3724, 4276, 4655, 5345, 7483, 9310, 10690, 14966, 18620, 20311, 21380, 29932, 37415, 40622, 52381, 74830, 81244, 101555, 104762, 142177, 149660, 203110, 209524, 261905, 284354, 406220, 523810, 568708, 710885, 995239, 1047620, 1421770, 1990478, 2843540, 3980956, 4976195, 9952390, 19904780]

約数ペア:

[(1, 19904780), (2, 9952390), (4, 4976195), (5, 3980956), (7, 2843540), (10, 1990478), (14, 1421770), (19, 1047620), (20, 995239), (28, 710885), (35, 568708), (38, 523810), (49, 406220), (70, 284354), (76, 261905), (95, 209524), (98, 203110), (133, 149660), (140, 142177), (190, 104762), (196, 101555), (245, 81244), (266, 74830), (380, 52381), (490, 40622), (532, 37415), (665, 29932), (931, 21380), (980, 20311), (1069, 18620), (1330, 14966), (1862, 10690), (2138, 9310), (2660, 7483), (3724, 5345), (4276, 4655)]