40405000

素因数分解:

$2^3\times 5^4\times {\mathrm{8081}}^1$

素因数の和:8107

約数の個数: 40

約数和(自身を含む): 94680630

約数和(自身を除く): 54275630

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 5000, 8081, 16162, 32324, 40405, 64648, 80810, 161620, 202025, 323240, 404050, 808100, 1010125, 1616200, 2020250, 4040500, 5050625, 8081000, 10101250, 20202500, 40405000]

約数ペア:

[(1, 40405000), (2, 20202500), (4, 10101250), (5, 8081000), (8, 5050625), (10, 4040500), (20, 2020250), (25, 1616200), (40, 1010125), (50, 808100), (100, 404050), (125, 323240), (200, 202025), (250, 161620), (500, 80810), (625, 64648), (1000, 40405), (1250, 32324), (2500, 16162), (5000, 8081)]