21000618125

素因数分解:

$5^4\times {\mathrm{7621}}^1\times {\mathrm{4409}}^1$

素因数の和:12050

約数の個数: 20

約数和(自身を含む): 26251768620

約数和(自身を除く): 5251150495

約数列:

[1, 5, 25, 125, 625, 4409, 7621, 22045, 38105, 110225, 190525, 551125, 952625, 2755625, 4763125, 33600989, 168004945, 840024725, 4200123625, 21000618125]

約数ペア:

[(1, 21000618125), (5, 4200123625), (25, 840024725), (125, 168004945), (625, 33600989), (4409, 4763125), (7621, 2755625), (22045, 952625), (38105, 551125), (110225, 190525)]