39890000

素因数分解:

$2^4\times 5^4\times {\mathrm{3989}}^1$

素因数の和:4017

約数の個数: 50

約数和(自身を含む): 96601890

約数和(自身を除く): 56711890

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 3989, 5000, 7978, 10000, 15956, 19945, 31912, 39890, 63824, 79780, 99725, 159560, 199450, 319120, 398900, 498625, 797800, 997250, 1595600, 1994500, 2493125, 3989000, 4986250, 7978000, 9972500, 19945000, 39890000]

約数ペア:

[(1, 39890000), (2, 19945000), (4, 9972500), (5, 7978000), (8, 4986250), (10, 3989000), (16, 2493125), (20, 1994500), (25, 1595600), (40, 997250), (50, 797800), (80, 498625), (100, 398900), (125, 319120), (200, 199450), (250, 159560), (400, 99725), (500, 79780), (625, 63824), (1000, 39890), (1250, 31912), (2000, 19945), (2500, 15956), (3989, 10000), (5000, 7978)]