1388778520

素因数分解:

$2^3\times 5^1\times {\mathrm{1109}}^1\times {\mathrm{31307}}^1$

素因数の和:32427

約数の個数: 32

約数和(自身を含む): 3127669200

約数和(自身を除く): 1738890680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1109, 2218, 4436, 5545, 8872, 11090, 22180, 31307, 44360, 62614, 125228, 156535, 250456, 313070, 626140, 1252280, 34719463, 69438926, 138877852, 173597315, 277755704, 347194630, 694389260, 1388778520]

約数ペア:

[(1, 1388778520), (2, 694389260), (4, 347194630), (5, 277755704), (8, 173597315), (10, 138877852), (20, 69438926), (40, 34719463), (1109, 1252280), (2218, 626140), (4436, 313070), (5545, 250456), (8872, 156535), (11090, 125228), (22180, 62614), (31307, 44360)]