31486280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{809}}^1$

素因数の和:966

約数の個数: 64

約数和(自身を含む): 81648000

約数和(自身を除く): 50161720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 139, 140, 278, 280, 556, 695, 809, 973, 1112, 1390, 1618, 1946, 2780, 3236, 3892, 4045, 4865, 5560, 5663, 6472, 7784, 8090, 9730, 11326, 16180, 19460, 22652, 28315, 32360, 38920, 45304, 56630, 112451, 113260, 224902, 226520, 449804, 562255, 787157, 899608, 1124510, 1574314, 2249020, 3148628, 3935785, 4498040, 6297256, 7871570, 15743140, 31486280]

約数ペア:

[(1, 31486280), (2, 15743140), (4, 7871570), (5, 6297256), (7, 4498040), (8, 3935785), (10, 3148628), (14, 2249020), (20, 1574314), (28, 1124510), (35, 899608), (40, 787157), (56, 562255), (70, 449804), (139, 226520), (140, 224902), (278, 113260), (280, 112451), (556, 56630), (695, 45304), (809, 38920), (973, 32360), (1112, 28315), (1390, 22652), (1618, 19460), (1946, 16180), (2780, 11326), (3236, 9730), (3892, 8090), (4045, 7784), (4865, 6472), (5560, 5663)]