80740840

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{5189}}^1$

素因数の和:5589

約数の個数: 32

約数和(自身を含む): 182169000

約数和(自身を除く): 101428160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1556, 1945, 3112, 3890, 5189, 7780, 10378, 15560, 20756, 25945, 41512, 51890, 103780, 207560, 2018521, 4037042, 8074084, 10092605, 16148168, 20185210, 40370420, 80740840]

約数ペア:

[(1, 80740840), (2, 40370420), (4, 20185210), (5, 16148168), (8, 10092605), (10, 8074084), (20, 4037042), (40, 2018521), (389, 207560), (778, 103780), (1556, 51890), (1945, 41512), (3112, 25945), (3890, 20756), (5189, 15560), (7780, 10378)]