20190920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{857}}^1$

素因数の和:918

約数の個数: 64

約数和(自身を含む): 49420800

約数和(自身を除く): 29229880

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 31, 38, 40, 62, 76, 95, 124, 152, 155, 190, 248, 310, 380, 589, 620, 760, 857, 1178, 1240, 1714, 2356, 2945, 3428, 4285, 4712, 5890, 6856, 8570, 11780, 16283, 17140, 23560, 26567, 32566, 34280, 53134, 65132, 81415, 106268, 130264, 132835, 162830, 212536, 265670, 325660, 504773, 531340, 651320, 1009546, 1062680, 2019092, 2523865, 4038184, 5047730, 10095460, 20190920]

約数ペア:

[(1, 20190920), (2, 10095460), (4, 5047730), (5, 4038184), (8, 2523865), (10, 2019092), (19, 1062680), (20, 1009546), (31, 651320), (38, 531340), (40, 504773), (62, 325660), (76, 265670), (95, 212536), (124, 162830), (152, 132835), (155, 130264), (190, 106268), (248, 81415), (310, 65132), (380, 53134), (589, 34280), (620, 32566), (760, 26567), (857, 23560), (1178, 17140), (1240, 16283), (1714, 11780), (2356, 8570), (2945, 6856), (3428, 5890), (4285, 4712)]