201721681

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{41}}^2\times {\mathrm{79}}^1$

素因数の和:206

約数の個数: 36

約数和(自身を含む): 251420160

約数和(自身を除く): 49698479

約数列:

[1, 7, 31, 41, 49, 79, 217, 287, 553, 1271, 1519, 1681, 2009, 2449, 3239, 3871, 8897, 11767, 17143, 22673, 52111, 62279, 82369, 100409, 120001, 132799, 158711, 364777, 702863, 929593, 2553439, 4116769, 4920041, 6507151, 28817383, 201721681]

約数ペア:

[(1, 201721681), (7, 28817383), (31, 6507151), (41, 4920041), (49, 4116769), (79, 2553439), (217, 929593), (287, 702863), (553, 364777), (1271, 158711), (1519, 132799), (1681, 120001), (2009, 100409), (2449, 82369), (3239, 62279), (3871, 52111), (8897, 22673), (11767, 17143)]