20208920

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1\times {\mathrm{263}}^1$

素因数の和:404

約数の個数: 64

約数和(自身を含む): 48755520

約数和(自身を除く): 28546600

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 113, 136, 170, 226, 263, 340, 452, 526, 565, 680, 904, 1052, 1130, 1315, 1921, 2104, 2260, 2630, 3842, 4471, 4520, 5260, 7684, 8942, 9605, 10520, 15368, 17884, 19210, 22355, 29719, 35768, 38420, 44710, 59438, 76840, 89420, 118876, 148595, 178840, 237752, 297190, 505223, 594380, 1010446, 1188760, 2020892, 2526115, 4041784, 5052230, 10104460, 20208920]

約数ペア:

[(1, 20208920), (2, 10104460), (4, 5052230), (5, 4041784), (8, 2526115), (10, 2020892), (17, 1188760), (20, 1010446), (34, 594380), (40, 505223), (68, 297190), (85, 237752), (113, 178840), (136, 148595), (170, 118876), (226, 89420), (263, 76840), (340, 59438), (452, 44710), (526, 38420), (565, 35768), (680, 29719), (904, 22355), (1052, 19210), (1130, 17884), (1315, 15368), (1921, 10520), (2104, 9605), (2260, 8942), (2630, 7684), (3842, 5260), (4471, 4520)]