20916520

素因数分解:

$2^3\times 5^1\times {\mathrm{151}}^1\times {\mathrm{3463}}^1$

素因数の和:3625

約数の個数: 32

約数和(自身を含む): 47387520

約数和(自身を除く): 26471000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 151, 302, 604, 755, 1208, 1510, 3020, 3463, 6040, 6926, 13852, 17315, 27704, 34630, 69260, 138520, 522913, 1045826, 2091652, 2614565, 4183304, 5229130, 10458260, 20916520]

約数ペア:

[(1, 20916520), (2, 10458260), (4, 5229130), (5, 4183304), (8, 2614565), (10, 2091652), (20, 1045826), (40, 522913), (151, 138520), (302, 69260), (604, 34630), (755, 27704), (1208, 17315), (1510, 13852), (3020, 6926), (3463, 6040)]