256348520

素因数分解:

$2^3\times 5^1\times {\mathrm{6408713}}^1$

素因数の和:6408724

約数の個数: 16

約数和(自身を含む): 576784260

約数和(自身を除く): 320435740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 6408713, 12817426, 25634852, 32043565, 51269704, 64087130, 128174260, 256348520]

約数ペア:

[(1, 256348520), (2, 128174260), (4, 64087130), (5, 51269704), (8, 32043565), (10, 25634852), (20, 12817426), (40, 6408713)]