79978000

素因数分解:

$2^4\times 5^3\times {\mathrm{39989}}^1$

素因数の和:40012

約数の個数: 40

約数和(自身を含む): 193391640

約数和(自身を除く): 113413640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 39989, 79978, 159956, 199945, 319912, 399890, 639824, 799780, 999725, 1599560, 1999450, 3199120, 3998900, 4998625, 7997800, 9997250, 15995600, 19994500, 39989000, 79978000]

約数ペア:

[(1, 79978000), (2, 39989000), (4, 19994500), (5, 15995600), (8, 9997250), (10, 7997800), (16, 4998625), (20, 3998900), (25, 3199120), (40, 1999450), (50, 1599560), (80, 999725), (100, 799780), (125, 639824), (200, 399890), (250, 319912), (400, 199945), (500, 159956), (1000, 79978), (2000, 39989)]