81716815

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{251}}^1$

素因数の和:447

約数の個数: 32

約数和(自身を含む): 108864000

約数和(自身を除く): 27147185

約数列:

[1, 5, 19, 23, 95, 115, 149, 251, 437, 745, 1255, 2185, 2831, 3427, 4769, 5773, 14155, 17135, 23845, 28865, 37399, 65113, 109687, 186995, 325565, 548435, 710581, 860177, 3552905, 4300885, 16343363, 81716815]

約数ペア:

[(1, 81716815), (5, 16343363), (19, 4300885), (23, 3552905), (95, 860177), (115, 710581), (149, 548435), (251, 325565), (437, 186995), (745, 109687), (1255, 65113), (2185, 37399), (2831, 28865), (3427, 23845), (4769, 17135), (5773, 14155)]