21002000

素因数分解:

$2^4\times 5^3\times {\mathrm{10501}}^1$

素因数の和:10524

約数の個数: 40

約数和(自身を含む): 50787672

約数和(自身を除く): 29785672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 10501, 21002, 42004, 52505, 84008, 105010, 168016, 210020, 262525, 420040, 525050, 840080, 1050100, 1312625, 2100200, 2625250, 4200400, 5250500, 10501000, 21002000]

約数ペア:

[(1, 21002000), (2, 10501000), (4, 5250500), (5, 4200400), (8, 2625250), (10, 2100200), (16, 1312625), (20, 1050100), (25, 840080), (40, 525050), (50, 420040), (80, 262525), (100, 210020), (125, 168016), (200, 105010), (250, 84008), (400, 52505), (500, 42004), (1000, 21002), (2000, 10501)]