15980840

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^2\times {\mathrm{89}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 36911700

約数和(自身を除く): 20930860

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 89, 134, 178, 268, 335, 356, 445, 536, 670, 712, 890, 1340, 1780, 2680, 3560, 4489, 5963, 8978, 11926, 17956, 22445, 23852, 29815, 35912, 44890, 47704, 59630, 89780, 119260, 179560, 238520, 399521, 799042, 1598084, 1997605, 3196168, 3995210, 7990420, 15980840]

約数ペア:

[(1, 15980840), (2, 7990420), (4, 3995210), (5, 3196168), (8, 1997605), (10, 1598084), (20, 799042), (40, 399521), (67, 238520), (89, 179560), (134, 119260), (178, 89780), (268, 59630), (335, 47704), (356, 44890), (445, 35912), (536, 29815), (670, 23852), (712, 22445), (890, 17956), (1340, 11926), (1780, 8978), (2680, 5963), (3560, 4489)]