64978520

素因数分解:

$2^3\times 5^1\times {\mathrm{419}}^1\times {\mathrm{3877}}^1$

素因数の和:4307

約数の個数: 32

約数和(自身を含む): 146588400

約数和(自身を除く): 81609880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 419, 838, 1676, 2095, 3352, 3877, 4190, 7754, 8380, 15508, 16760, 19385, 31016, 38770, 77540, 155080, 1624463, 3248926, 6497852, 8122315, 12995704, 16244630, 32489260, 64978520]

約数ペア:

[(1, 64978520), (2, 32489260), (4, 16244630), (5, 12995704), (8, 8122315), (10, 6497852), (20, 3248926), (40, 1624463), (419, 155080), (838, 77540), (1676, 38770), (2095, 31016), (3352, 19385), (3877, 16760), (4190, 15508), (7754, 8380)]