21647680

素因数分解:

$2^6\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1109}}^1$

素因数の和:1187

約数の個数: 56

約数和(自身を含む): 52440840

約数和(自身を除く): 30793160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 160, 244, 305, 320, 488, 610, 976, 1109, 1220, 1952, 2218, 2440, 3904, 4436, 4880, 5545, 8872, 9760, 11090, 17744, 19520, 22180, 35488, 44360, 67649, 70976, 88720, 135298, 177440, 270596, 338245, 354880, 541192, 676490, 1082384, 1352980, 2164768, 2705960, 4329536, 5411920, 10823840, 21647680]

約数ペア:

[(1, 21647680), (2, 10823840), (4, 5411920), (5, 4329536), (8, 2705960), (10, 2164768), (16, 1352980), (20, 1082384), (32, 676490), (40, 541192), (61, 354880), (64, 338245), (80, 270596), (122, 177440), (160, 135298), (244, 88720), (305, 70976), (320, 67649), (488, 44360), (610, 35488), (976, 22180), (1109, 19520), (1220, 17744), (1952, 11090), (2218, 9760), (2440, 8872), (3904, 5545), (4436, 4880)]