21803840

素因数分解:

$2^6\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1117}}^1$

素因数の和:1195

約数の個数: 56

約数和(自身を含む): 52818792

約数和(自身を除く): 31014952

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 160, 244, 305, 320, 488, 610, 976, 1117, 1220, 1952, 2234, 2440, 3904, 4468, 4880, 5585, 8936, 9760, 11170, 17872, 19520, 22340, 35744, 44680, 68137, 71488, 89360, 136274, 178720, 272548, 340685, 357440, 545096, 681370, 1090192, 1362740, 2180384, 2725480, 4360768, 5450960, 10901920, 21803840]

約数ペア:

[(1, 21803840), (2, 10901920), (4, 5450960), (5, 4360768), (8, 2725480), (10, 2180384), (16, 1362740), (20, 1090192), (32, 681370), (40, 545096), (61, 357440), (64, 340685), (80, 272548), (122, 178720), (160, 136274), (244, 89360), (305, 71488), (320, 68137), (488, 44680), (610, 35744), (976, 22340), (1117, 19520), (1220, 17872), (1952, 11170), (2234, 9760), (2440, 8936), (3904, 5585), (4468, 4880)]