199978000

素因数分解:

$2^4\times 5^3\times {\mathrm{99989}}^1$

素因数の和:100012

約数の個数: 40

約数和(自身を含む): 483551640

約数和(自身を除く): 283573640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 99989, 199978, 399956, 499945, 799912, 999890, 1599824, 1999780, 2499725, 3999560, 4999450, 7999120, 9998900, 12498625, 19997800, 24997250, 39995600, 49994500, 99989000, 199978000]

約数ペア:

[(1, 199978000), (2, 99989000), (4, 49994500), (5, 39995600), (8, 24997250), (10, 19997800), (16, 12498625), (20, 9998900), (25, 7999120), (40, 4999450), (50, 3999560), (80, 2499725), (100, 1999780), (125, 1599824), (200, 999890), (250, 799912), (400, 499945), (500, 399956), (1000, 199978), (2000, 99989)]