72080421

素因数分解:

$3^1\times 7^4\times {\mathrm{10007}}^1$

素因数の和:10038

約数の個数: 20

約数和(自身を含む): 112129632

約数和(自身を除く): 40049211

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 2401, 7203, 10007, 30021, 70049, 210147, 490343, 1471029, 3432401, 10297203, 24026807, 72080421]

約数ペア:

[(1, 72080421), (3, 24026807), (7, 10297203), (21, 3432401), (49, 1471029), (147, 490343), (343, 210147), (1029, 70049), (2401, 30021), (7203, 10007)]