51389720

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{4999}}^1$

素因数の和:5267

約数の個数: 32

約数和(自身を含む): 116100000

約数和(自身を除く): 64710280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2570, 4999, 5140, 9998, 10280, 19996, 24995, 39992, 49990, 99980, 199960, 1284743, 2569486, 5138972, 6423715, 10277944, 12847430, 25694860, 51389720]

約数ペア:

[(1, 51389720), (2, 25694860), (4, 12847430), (5, 10277944), (8, 6423715), (10, 5138972), (20, 2569486), (40, 1284743), (257, 199960), (514, 99980), (1028, 49990), (1285, 39992), (2056, 24995), (2570, 19996), (4999, 10280), (5140, 9998)]