21681736

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{2129}}^1$

素因数の和:2221

約数の個数: 32

約数和(自身を含む): 43452000

約数和(自身を除く): 21770264

約数列:

[1, 2, 4, 8, 19, 38, 67, 76, 134, 152, 268, 536, 1273, 2129, 2546, 4258, 5092, 8516, 10184, 17032, 40451, 80902, 142643, 161804, 285286, 323608, 570572, 1141144, 2710217, 5420434, 10840868, 21681736]

約数ペア:

[(1, 21681736), (2, 10840868), (4, 5420434), (8, 2710217), (19, 1141144), (38, 570572), (67, 323608), (76, 285286), (134, 161804), (152, 142643), (268, 80902), (536, 40451), (1273, 17032), (2129, 10184), (2546, 8516), (4258, 5092)]