38920

素因数分解:

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

素因数の和:157

約数の個数: 32

約数和(自身を含む): 100800

約数和(自身を除く): 61880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 139, 140, 278, 280, 556, 695, 973, 1112, 1390, 1946, 2780, 3892, 4865, 5560, 7784, 9730, 19460, 38920]

約数ペア:

[(1, 38920), (2, 19460), (4, 9730), (5, 7784), (7, 5560), (8, 4865), (10, 3892), (14, 2780), (20, 1946), (28, 1390), (35, 1112), (40, 973), (56, 695), (70, 556), (139, 280), (140, 278)]