71621720

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{16427}}^1$

素因数の和:16547

約数の個数: 32

約数和(自身を含む): 162637200

約数和(自身を除く): 91015480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 16427, 32854, 65708, 82135, 131416, 164270, 328540, 657080, 1790543, 3581086, 7162172, 8952715, 14324344, 17905430, 35810860, 71621720]

約数ペア:

[(1, 71621720), (2, 35810860), (4, 17905430), (5, 14324344), (8, 8952715), (10, 7162172), (20, 3581086), (40, 1790543), (109, 657080), (218, 328540), (436, 164270), (545, 131416), (872, 82135), (1090, 65708), (2180, 32854), (4360, 16427)]