661177040

素因数分解:

$2^4\times 5^1\times {\mathrm{8264713}}^1$

素因数の和:8264726

約数の個数: 20

約数和(自身を含む): 1537236804

約数和(自身を除く): 876059764

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8264713, 16529426, 33058852, 41323565, 66117704, 82647130, 132235408, 165294260, 330588520, 661177040]

約数ペア:

[(1, 661177040), (2, 330588520), (4, 165294260), (5, 132235408), (8, 82647130), (10, 66117704), (16, 41323565), (20, 33058852), (40, 16529426), (80, 8264713)]