138804920

素因数分解:

$2^3\times 5^1\times {\mathrm{863}}^1\times {\mathrm{4021}}^1$

素因数の和:4895

約数の個数: 32

約数和(自身を含む): 312750720

約数和(自身を除く): 173945800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 863, 1726, 3452, 4021, 4315, 6904, 8042, 8630, 16084, 17260, 20105, 32168, 34520, 40210, 80420, 160840, 3470123, 6940246, 13880492, 17350615, 27760984, 34701230, 69402460, 138804920]

約数ペア:

[(1, 138804920), (2, 69402460), (4, 34701230), (5, 27760984), (8, 17350615), (10, 13880492), (20, 6940246), (40, 3470123), (863, 160840), (1726, 80420), (3452, 40210), (4021, 34520), (4315, 32168), (6904, 20105), (8042, 17260), (8630, 16084)]