19778920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{70639}}^1$

素因数の和:70657

約数の個数: 32

約数和(自身を含む): 50860800

約数和(自身を除く): 31081880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 70639, 141278, 282556, 353195, 494473, 565112, 706390, 988946, 1412780, 1977892, 2472365, 2825560, 3955784, 4944730, 9889460, 19778920]

約数ペア:

[(1, 19778920), (2, 9889460), (4, 4944730), (5, 3955784), (7, 2825560), (8, 2472365), (10, 1977892), (14, 1412780), (20, 988946), (28, 706390), (35, 565112), (40, 494473), (56, 353195), (70, 282556), (140, 141278), (280, 70639)]