641596880

素因数分解:

$2^4\times 5^1\times {\mathrm{8019961}}^1$

素因数の和:8019974

約数の個数: 20

約数和(自身を含む): 1491712932

約数和(自身を除く): 850116052

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8019961, 16039922, 32079844, 40099805, 64159688, 80199610, 128319376, 160399220, 320798440, 641596880]

約数ペア:

[(1, 641596880), (2, 320798440), (4, 160399220), (5, 128319376), (8, 80199610), (10, 64159688), (16, 40099805), (20, 32079844), (40, 16039922), (80, 8019961)]