261303040

素因数分解:

$2^8\times 5^1\times {\mathrm{204143}}^1$

素因数の和:204164

約数の個数: 36

約数和(自身を含む): 625905504

約数和(自身を除く): 364602464

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 204143, 408286, 816572, 1020715, 1633144, 2041430, 3266288, 4082860, 6532576, 8165720, 13065152, 16331440, 26130304, 32662880, 52260608, 65325760, 130651520, 261303040]

約数ペア:

[(1, 261303040), (2, 130651520), (4, 65325760), (5, 52260608), (8, 32662880), (10, 26130304), (16, 16331440), (20, 13065152), (32, 8165720), (40, 6532576), (64, 4082860), (80, 3266288), (128, 2041430), (160, 1633144), (256, 1020715), (320, 816572), (640, 408286), (1280, 204143)]