12804920

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{2039}}^1$

素因数の和:2207

約数の個数: 32

約数和(自身を含む): 29008800

約数和(自身を除く): 16203880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 2039, 3140, 4078, 6280, 8156, 10195, 16312, 20390, 40780, 81560, 320123, 640246, 1280492, 1600615, 2560984, 3201230, 6402460, 12804920]

約数ペア:

[(1, 12804920), (2, 6402460), (4, 3201230), (5, 2560984), (8, 1600615), (10, 1280492), (20, 640246), (40, 320123), (157, 81560), (314, 40780), (628, 20390), (785, 16312), (1256, 10195), (1570, 8156), (2039, 6280), (3140, 4078)]