19801420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{487}}^1$

素因数の和:622

約数の個数: 48

約数和(自身を含む): 44271360

約数和(自身を除く): 24469940

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 107, 190, 214, 380, 428, 487, 535, 974, 1070, 1948, 2033, 2140, 2435, 4066, 4870, 8132, 9253, 9740, 10165, 18506, 20330, 37012, 40660, 46265, 52109, 92530, 104218, 185060, 208436, 260545, 521090, 990071, 1042180, 1980142, 3960284, 4950355, 9900710, 19801420]

約数ペア:

[(1, 19801420), (2, 9900710), (4, 4950355), (5, 3960284), (10, 1980142), (19, 1042180), (20, 990071), (38, 521090), (76, 260545), (95, 208436), (107, 185060), (190, 104218), (214, 92530), (380, 52109), (428, 46265), (487, 40660), (535, 37012), (974, 20330), (1070, 18506), (1948, 10165), (2033, 9740), (2140, 9253), (2435, 8132), (4066, 4870)]