81987005

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{131}}^1\times {\mathrm{199}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 108345600

約数和(自身を除く): 26358595

約数列:

[1, 5, 17, 37, 85, 131, 185, 199, 629, 655, 995, 2227, 3145, 3383, 4847, 7363, 11135, 16915, 24235, 26069, 36815, 82399, 125171, 130345, 411995, 443173, 625855, 964553, 2215865, 4822765, 16397401, 81987005]

約数ペア:

[(1, 81987005), (5, 16397401), (17, 4822765), (37, 2215865), (85, 964553), (131, 625855), (185, 443173), (199, 411995), (629, 130345), (655, 125171), (995, 82399), (2227, 36815), (3145, 26069), (3383, 24235), (4847, 16915), (7363, 11135)]