128808520

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{23167}}^1$

素因数の和:23317

約数の個数: 32

約数和(自身を含む): 291916800

約数和(自身を除く): 163108280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 5560, 23167, 46334, 92668, 115835, 185336, 231670, 463340, 926680, 3220213, 6440426, 12880852, 16101065, 25761704, 32202130, 64404260, 128808520]

約数ペア:

[(1, 128808520), (2, 64404260), (4, 32202130), (5, 25761704), (8, 16101065), (10, 12880852), (20, 6440426), (40, 3220213), (139, 926680), (278, 463340), (556, 231670), (695, 185336), (1112, 115835), (1390, 92668), (2780, 46334), (5560, 23167)]