20605480

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10513}}^1$

素因数の和:10538

約数の個数: 48

約数和(自身を含む): 53936820

約数和(自身を除く): 33331340

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10513, 21026, 42052, 52565, 73591, 84104, 105130, 147182, 210260, 294364, 367955, 420520, 515137, 588728, 735910, 1030274, 1471820, 2060548, 2575685, 2943640, 4121096, 5151370, 10302740, 20605480]

約数ペア:

[(1, 20605480), (2, 10302740), (4, 5151370), (5, 4121096), (7, 2943640), (8, 2575685), (10, 2060548), (14, 1471820), (20, 1030274), (28, 735910), (35, 588728), (40, 515137), (49, 420520), (56, 367955), (70, 294364), (98, 210260), (140, 147182), (196, 105130), (245, 84104), (280, 73591), (392, 52565), (490, 42052), (980, 21026), (1960, 10513)]