20809921965

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{28312819}}^1$

素因数の和:28312841

約数の個数: 24

約数和(自身を含む): 38731937760

約数和(自身を除く): 17922015795

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 28312819, 84938457, 141564095, 198189733, 424692285, 594569199, 990948665, 1387328131, 2972845995, 4161984393, 6936640655, 20809921965]

約数ペア:

[(1, 20809921965), (3, 6936640655), (5, 4161984393), (7, 2972845995), (15, 1387328131), (21, 990948665), (35, 594569199), (49, 424692285), (105, 198189733), (147, 141564095), (245, 84938457), (735, 28312819)]