12778400

素因数分解:

$2^5\times 5^2\times {\mathrm{15973}}^1$

素因数の和:15993

約数の個数: 36

約数和(自身を含む): 31197222

約数和(自身を除く): 18418822

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800, 15973, 31946, 63892, 79865, 127784, 159730, 255568, 319460, 399325, 511136, 638920, 798650, 1277840, 1597300, 2555680, 3194600, 6389200, 12778400]

約数ペア:

[(1, 12778400), (2, 6389200), (4, 3194600), (5, 2555680), (8, 1597300), (10, 1277840), (16, 798650), (20, 638920), (25, 511136), (32, 399325), (40, 319460), (50, 255568), (80, 159730), (100, 127784), (160, 79865), (200, 63892), (400, 31946), (800, 15973)]