8420000

素因数分解:

$2^5\times 5^4\times {\mathrm{421}}^1$

素因数の和:451

約数の個数: 60

約数和(自身を含む): 20763666

約数和(自身を除く): 12343666

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 421, 500, 625, 800, 842, 1000, 1250, 1684, 2000, 2105, 2500, 3368, 4000, 4210, 5000, 6736, 8420, 10000, 10525, 13472, 16840, 20000, 21050, 33680, 42100, 52625, 67360, 84200, 105250, 168400, 210500, 263125, 336800, 421000, 526250, 842000, 1052500, 1684000, 2105000, 4210000, 8420000]

約数ペア:

[(1, 8420000), (2, 4210000), (4, 2105000), (5, 1684000), (8, 1052500), (10, 842000), (16, 526250), (20, 421000), (25, 336800), (32, 263125), (40, 210500), (50, 168400), (80, 105250), (100, 84200), (125, 67360), (160, 52625), (200, 42100), (250, 33680), (400, 21050), (421, 20000), (500, 16840), (625, 13472), (800, 10525), (842, 10000), (1000, 8420), (1250, 6736), (1684, 5000), (2000, 4210), (2105, 4000), (2500, 3368)]