28720210

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{2129}}^1$

素因数の和:2226

約数の個数: 32

約数和(自身を含む): 55209600

約数和(自身を除く): 26489390

約数列:

[1, 2, 5, 10, 19, 38, 71, 95, 142, 190, 355, 710, 1349, 2129, 2698, 4258, 6745, 10645, 13490, 21290, 40451, 80902, 151159, 202255, 302318, 404510, 755795, 1511590, 2872021, 5744042, 14360105, 28720210]

約数ペア:

[(1, 28720210), (2, 14360105), (5, 5744042), (10, 2872021), (19, 1511590), (38, 755795), (71, 404510), (95, 302318), (142, 202255), (190, 151159), (355, 80902), (710, 40451), (1349, 21290), (2129, 13490), (2698, 10645), (4258, 6745)]