19721777

素因数分解:

${\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:292

約数の個数: 16

約数和(自身を含む): 21053520

約数和(自身を除く): 1331743

約数列:

[1, 37, 53, 89, 113, 1961, 3293, 4181, 4717, 5989, 10057, 174529, 221593, 372109, 533021, 19721777]

約数ペア:

[(1, 19721777), (37, 533021), (53, 372109), (89, 221593), (113, 174529), (1961, 10057), (3293, 5989), (4181, 4717)]