20720645

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{1181}}^1$

素因数の和:1237

約数の個数: 24

約数和(自身を含む): 28297080

約数和(自身を除く): 7576435

約数列:

[1, 5, 11, 29, 55, 121, 145, 319, 605, 1181, 1595, 3509, 5905, 12991, 17545, 34249, 64955, 142901, 171245, 376739, 714505, 1883695, 4144129, 20720645]

約数ペア:

[(1, 20720645), (5, 4144129), (11, 1883695), (29, 714505), (55, 376739), (121, 171245), (145, 142901), (319, 64955), (605, 34249), (1181, 17545), (1595, 12991), (3509, 5905)]