20539960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{673}}^1$

素因数の和:800

約数の個数: 64

約数和(自身を含む): 53380800

約数和(自身を除く): 32840840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 109, 140, 218, 280, 436, 545, 673, 763, 872, 1090, 1346, 1526, 2180, 2692, 3052, 3365, 3815, 4360, 4711, 5384, 6104, 6730, 7630, 9422, 13460, 15260, 18844, 23555, 26920, 30520, 37688, 47110, 73357, 94220, 146714, 188440, 293428, 366785, 513499, 586856, 733570, 1026998, 1467140, 2053996, 2567495, 2934280, 4107992, 5134990, 10269980, 20539960]

約数ペア:

[(1, 20539960), (2, 10269980), (4, 5134990), (5, 4107992), (7, 2934280), (8, 2567495), (10, 2053996), (14, 1467140), (20, 1026998), (28, 733570), (35, 586856), (40, 513499), (56, 366785), (70, 293428), (109, 188440), (140, 146714), (218, 94220), (280, 73357), (436, 47110), (545, 37688), (673, 30520), (763, 26920), (872, 23555), (1090, 18844), (1346, 15260), (1526, 13460), (2180, 9422), (2692, 7630), (3052, 6730), (3365, 6104), (3815, 5384), (4360, 4711)]