128438320

素因数分解:

$2^4\times 5^1\times {\mathrm{257}}^1\times {\mathrm{6247}}^1$

素因数の和:6517

約数の個数: 40

約数和(自身を含む): 299829024

約数和(自身を除く): 171390704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257, 514, 1028, 1285, 2056, 2570, 4112, 5140, 6247, 10280, 12494, 20560, 24988, 31235, 49976, 62470, 99952, 124940, 249880, 499760, 1605479, 3210958, 6421916, 8027395, 12843832, 16054790, 25687664, 32109580, 64219160, 128438320]

約数ペア:

[(1, 128438320), (2, 64219160), (4, 32109580), (5, 25687664), (8, 16054790), (10, 12843832), (16, 8027395), (20, 6421916), (40, 3210958), (80, 1605479), (257, 499760), (514, 249880), (1028, 124940), (1285, 99952), (2056, 62470), (2570, 49976), (4112, 31235), (5140, 24988), (6247, 20560), (10280, 12494)]