995020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:154

約数の個数: 48

約数和(自身を含む): 2328480

約数和(自身を除く): 1333460

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 43, 52, 65, 86, 89, 130, 172, 178, 215, 260, 356, 430, 445, 559, 860, 890, 1118, 1157, 1780, 2236, 2314, 2795, 3827, 4628, 5590, 5785, 7654, 11180, 11570, 15308, 19135, 23140, 38270, 49751, 76540, 99502, 199004, 248755, 497510, 995020]

約数ペア:

[(1, 995020), (2, 497510), (4, 248755), (5, 199004), (10, 99502), (13, 76540), (20, 49751), (26, 38270), (43, 23140), (52, 19135), (65, 15308), (86, 11570), (89, 11180), (130, 7654), (172, 5785), (178, 5590), (215, 4628), (260, 3827), (356, 2795), (430, 2314), (445, 2236), (559, 1780), (860, 1157), (890, 1118)]