20396000

素因数分解:

$2^5\times 5^3\times {\mathrm{5099}}^1$

素因数の和:5124

約数の個数: 48

約数和(自身を含む): 50122800

約数和(自身を除く): 29726800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 5099, 10198, 20396, 25495, 40792, 50990, 81584, 101980, 127475, 163168, 203960, 254950, 407920, 509900, 637375, 815840, 1019800, 1274750, 2039600, 2549500, 4079200, 5099000, 10198000, 20396000]

約数ペア:

[(1, 20396000), (2, 10198000), (4, 5099000), (5, 4079200), (8, 2549500), (10, 2039600), (16, 1274750), (20, 1019800), (25, 815840), (32, 637375), (40, 509900), (50, 407920), (80, 254950), (100, 203960), (125, 163168), (160, 127475), (200, 101980), (250, 81584), (400, 50990), (500, 40792), (800, 25495), (1000, 20396), (2000, 10198), (4000, 5099)]