261345

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1$

素因数の和:165

約数の個数: 32

約数和(自身を含む): 506880

約数和(自身を除く): 245535

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 131, 133, 285, 393, 399, 655, 665, 917, 1965, 1995, 2489, 2751, 4585, 7467, 12445, 13755, 17423, 37335, 52269, 87115, 261345]

約数ペア:

[(1, 261345), (3, 87115), (5, 52269), (7, 37335), (15, 17423), (19, 13755), (21, 12445), (35, 7467), (57, 4585), (95, 2751), (105, 2489), (131, 1995), (133, 1965), (285, 917), (393, 665), (399, 655)]