21805016

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{2393}}^1$

素因数の和:2483

約数の個数: 32

約数和(自身を含む): 43953840

約数和(自身を除く): 22148824

約数列:

[1, 2, 4, 8, 17, 34, 67, 68, 134, 136, 268, 536, 1139, 2278, 2393, 4556, 4786, 9112, 9572, 19144, 40681, 81362, 160331, 162724, 320662, 325448, 641324, 1282648, 2725627, 5451254, 10902508, 21805016]

約数ペア:

[(1, 21805016), (2, 10902508), (4, 5451254), (8, 2725627), (17, 1282648), (34, 641324), (67, 325448), (68, 320662), (134, 162724), (136, 160331), (268, 81362), (536, 40681), (1139, 19144), (2278, 9572), (2393, 9112), (4556, 4786)]