1221460

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{389}}^1$

素因数の和:555

約数の個数: 24

約数和(自身を含む): 2588040

約数和(自身を除く): 1366580

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 389, 628, 778, 785, 1556, 1570, 1945, 3140, 3890, 7780, 61073, 122146, 244292, 305365, 610730, 1221460]

約数ペア:

[(1, 1221460), (2, 610730), (4, 305365), (5, 244292), (10, 122146), (20, 61073), (157, 7780), (314, 3890), (389, 3140), (628, 1945), (778, 1570), (785, 1556)]