21065395

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{461}}^1$

素因数の和:535

約数の個数: 32

約数和(自身を含む): 29494080

約数和(自身を除く): 8428685

約数列:

[1, 5, 13, 19, 37, 65, 95, 185, 247, 461, 481, 703, 1235, 2305, 2405, 3515, 5993, 8759, 9139, 17057, 29965, 43795, 45695, 85285, 113867, 221741, 324083, 569335, 1108705, 1620415, 4213079, 21065395]

約数ペア:

[(1, 21065395), (5, 4213079), (13, 1620415), (19, 1108705), (37, 569335), (65, 324083), (95, 221741), (185, 113867), (247, 85285), (461, 45695), (481, 43795), (703, 29965), (1235, 17057), (2305, 9139), (2405, 8759), (3515, 5993)]