20991432005

素因数分解:

$5^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1\times {\mathrm{281}}^1\times {\mathrm{1213}}^1$

素因数の和:1721

約数の個数: 32

約数和(自身を含む): 25758263520

約数和(自身を除く): 4766831515

約数列:

[1, 5, 109, 113, 281, 545, 565, 1213, 1405, 6065, 12317, 30629, 31753, 61585, 132217, 137069, 153145, 158765, 340853, 661085, 685345, 1704265, 3461077, 14940521, 17305385, 37152977, 38516389, 74702605, 185764885, 192581945, 4198286401, 20991432005]

約数ペア:

[(1, 20991432005), (5, 4198286401), (109, 192581945), (113, 185764885), (281, 74702605), (545, 38516389), (565, 37152977), (1213, 17305385), (1405, 14940521), (6065, 3461077), (12317, 1704265), (30629, 685345), (31753, 661085), (61585, 340853), (132217, 158765), (137069, 153145)]