20171540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{487}}^1$

素因数の和:624

約数の個数: 48

約数和(自身を含む): 45091200

約数和(自身を除く): 24919660

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 109, 190, 218, 380, 436, 487, 545, 974, 1090, 1948, 2071, 2180, 2435, 4142, 4870, 8284, 9253, 9740, 10355, 18506, 20710, 37012, 41420, 46265, 53083, 92530, 106166, 185060, 212332, 265415, 530830, 1008577, 1061660, 2017154, 4034308, 5042885, 10085770, 20171540]

約数ペア:

[(1, 20171540), (2, 10085770), (4, 5042885), (5, 4034308), (10, 2017154), (19, 1061660), (20, 1008577), (38, 530830), (76, 265415), (95, 212332), (109, 185060), (190, 106166), (218, 92530), (380, 53083), (436, 46265), (487, 41420), (545, 37012), (974, 20710), (1090, 18506), (1948, 10355), (2071, 9740), (2180, 9253), (2435, 8284), (4142, 4870)]