199978840

素因数分解:

$2^3\times 5^1\times {\mathrm{2221}}^1\times {\mathrm{2251}}^1$

素因数の和:4483

約数の個数: 32

約数和(自身を含む): 450354960

約数和(自身を除く): 250376120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2221, 2251, 4442, 4502, 8884, 9004, 11105, 11255, 17768, 18008, 22210, 22510, 44420, 45020, 88840, 90040, 4999471, 9998942, 19997884, 24997355, 39995768, 49994710, 99989420, 199978840]

約数ペア:

[(1, 199978840), (2, 99989420), (4, 49994710), (5, 39995768), (8, 24997355), (10, 19997884), (20, 9998942), (40, 4999471), (2221, 90040), (2251, 88840), (4442, 45020), (4502, 44420), (8884, 22510), (9004, 22210), (11105, 18008), (11255, 17768)]