18620440

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{197}}^1$

素因数の和:364

約数の個数: 64

約数和(自身を含む): 44906400

約数和(自身を除く): 26285960

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 139, 170, 197, 278, 340, 394, 556, 680, 695, 788, 985, 1112, 1390, 1576, 1970, 2363, 2780, 3349, 3940, 4726, 5560, 6698, 7880, 9452, 11815, 13396, 16745, 18904, 23630, 26792, 27383, 33490, 47260, 54766, 66980, 94520, 109532, 133960, 136915, 219064, 273830, 465511, 547660, 931022, 1095320, 1862044, 2327555, 3724088, 4655110, 9310220, 18620440]

約数ペア:

[(1, 18620440), (2, 9310220), (4, 4655110), (5, 3724088), (8, 2327555), (10, 1862044), (17, 1095320), (20, 931022), (34, 547660), (40, 465511), (68, 273830), (85, 219064), (136, 136915), (139, 133960), (170, 109532), (197, 94520), (278, 66980), (340, 54766), (394, 47260), (556, 33490), (680, 27383), (695, 26792), (788, 23630), (985, 18904), (1112, 16745), (1390, 13396), (1576, 11815), (1970, 9452), (2363, 7880), (2780, 6698), (3349, 5560), (3940, 4726)]