21540320

素因数分解:

$2^5\times 5^1\times {\mathrm{61}}^1\times {\mathrm{2207}}^1$

素因数の和:2283

約数の個数: 48

約数和(自身を含む): 51746688

約数和(自身を除く): 30206368

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 80, 122, 160, 244, 305, 488, 610, 976, 1220, 1952, 2207, 2440, 4414, 4880, 8828, 9760, 11035, 17656, 22070, 35312, 44140, 70624, 88280, 134627, 176560, 269254, 353120, 538508, 673135, 1077016, 1346270, 2154032, 2692540, 4308064, 5385080, 10770160, 21540320]

約数ペア:

[(1, 21540320), (2, 10770160), (4, 5385080), (5, 4308064), (8, 2692540), (10, 2154032), (16, 1346270), (20, 1077016), (32, 673135), (40, 538508), (61, 353120), (80, 269254), (122, 176560), (160, 134627), (244, 88280), (305, 70624), (488, 44140), (610, 35312), (976, 22070), (1220, 17656), (1952, 11035), (2207, 9760), (2440, 8828), (4414, 4880)]