3999500

素因数分解:

$2^2\times 5^3\times {\mathrm{19}}^1\times {\mathrm{421}}^1$

素因数の和:459

約数の個数: 48

約数和(自身を含む): 9216480

約数和(自身を除く): 5216980

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 125, 190, 250, 380, 421, 475, 500, 842, 950, 1684, 1900, 2105, 2375, 4210, 4750, 7999, 8420, 9500, 10525, 15998, 21050, 31996, 39995, 42100, 52625, 79990, 105250, 159980, 199975, 210500, 399950, 799900, 999875, 1999750, 3999500]

約数ペア:

[(1, 3999500), (2, 1999750), (4, 999875), (5, 799900), (10, 399950), (19, 210500), (20, 199975), (25, 159980), (38, 105250), (50, 79990), (76, 52625), (95, 42100), (100, 39995), (125, 31996), (190, 21050), (250, 15998), (380, 10525), (421, 9500), (475, 8420), (500, 7999), (842, 4750), (950, 4210), (1684, 2375), (1900, 2105)]