20969360

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{4297}}^1$

素因数の和:4371

約数の個数: 40

約数和(自身を含む): 49564536

約数和(自身を除く): 28595176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4297, 4880, 8594, 17188, 21485, 34376, 42970, 68752, 85940, 171880, 262117, 343760, 524234, 1048468, 1310585, 2096936, 2621170, 4193872, 5242340, 10484680, 20969360]

約数ペア:

[(1, 20969360), (2, 10484680), (4, 5242340), (5, 4193872), (8, 2621170), (10, 2096936), (16, 1310585), (20, 1048468), (40, 524234), (61, 343760), (80, 262117), (122, 171880), (244, 85940), (305, 68752), (488, 42970), (610, 34376), (976, 21485), (1220, 17188), (2440, 8594), (4297, 4880)]