81891125

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{433}}^1$

素因数の和:554

約数の個数: 32

約数和(自身を含む): 109680480

約数和(自身を除く): 27789355

約数列:

[1, 5, 17, 25, 85, 89, 125, 425, 433, 445, 1513, 2125, 2165, 2225, 7361, 7565, 10825, 11125, 36805, 37825, 38537, 54125, 184025, 189125, 192685, 655129, 920125, 963425, 3275645, 4817125, 16378225, 81891125]

約数ペア:

[(1, 81891125), (5, 16378225), (17, 4817125), (25, 3275645), (85, 963425), (89, 920125), (125, 655129), (425, 192685), (433, 189125), (445, 184025), (1513, 54125), (2125, 38537), (2165, 37825), (2225, 36805), (7361, 11125), (7565, 10825)]