20278405

素因数分解:

$5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{2237}}^1$

素因数の和:2293

約数の個数: 24

約数和(自身を含む): 29085048

約数和(自身を除く): 8806643

約数列:

[1, 5, 7, 35, 37, 49, 185, 245, 259, 1295, 1813, 2237, 9065, 11185, 15659, 78295, 82769, 109613, 413845, 548065, 579383, 2896915, 4055681, 20278405]

約数ペア:

[(1, 20278405), (5, 4055681), (7, 2896915), (35, 579383), (37, 548065), (49, 413845), (185, 109613), (245, 82769), (259, 78295), (1295, 15659), (1813, 11185), (2237, 9065)]