80890000

素因数分解:

$2^4\times 5^4\times {\mathrm{8089}}^1$

素因数の和:8117

約数の個数: 50

約数和(自身を含む): 195866990

約数和(自身を除く): 114976990

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 5000, 8089, 10000, 16178, 32356, 40445, 64712, 80890, 129424, 161780, 202225, 323560, 404450, 647120, 808900, 1011125, 1617800, 2022250, 3235600, 4044500, 5055625, 8089000, 10111250, 16178000, 20222500, 40445000, 80890000]

約数ペア:

[(1, 80890000), (2, 40445000), (4, 20222500), (5, 16178000), (8, 10111250), (10, 8089000), (16, 5055625), (20, 4044500), (25, 3235600), (40, 2022250), (50, 1617800), (80, 1011125), (100, 808900), (125, 647120), (200, 404450), (250, 323560), (400, 202225), (500, 161780), (625, 129424), (1000, 80890), (1250, 64712), (2000, 40445), (2500, 32356), (5000, 16178), (8089, 10000)]