2005000

素因数分解:

$2^3\times 5^4\times {\mathrm{401}}^1$

素因数の和:427

約数の個数: 40

約数和(自身を含む): 4709430

約数和(自身を除く): 2704430

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 401, 500, 625, 802, 1000, 1250, 1604, 2005, 2500, 3208, 4010, 5000, 8020, 10025, 16040, 20050, 40100, 50125, 80200, 100250, 200500, 250625, 401000, 501250, 1002500, 2005000]

約数ペア:

[(1, 2005000), (2, 1002500), (4, 501250), (5, 401000), (8, 250625), (10, 200500), (20, 100250), (25, 80200), (40, 50125), (50, 40100), (100, 20050), (125, 16040), (200, 10025), (250, 8020), (401, 5000), (500, 4010), (625, 3208), (802, 2500), (1000, 2005), (1250, 1604)]