19901630

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{401}}^1\times {\mathrm{709}}^1$

素因数の和:1124

約数の個数: 32

約数和(自身を含む): 41100480

約数和(自身を除く): 21198850

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 401, 709, 802, 1418, 2005, 2807, 3545, 4010, 4963, 5614, 7090, 9926, 14035, 24815, 28070, 49630, 284309, 568618, 1421545, 1990163, 2843090, 3980326, 9950815, 19901630]

約数ペア:

[(1, 19901630), (2, 9950815), (5, 3980326), (7, 2843090), (10, 1990163), (14, 1421545), (35, 568618), (70, 284309), (401, 49630), (709, 28070), (802, 24815), (1418, 14035), (2005, 9926), (2807, 7090), (3545, 5614), (4010, 4963)]