21651208

素因数分解:

$2^3\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{647}}^1$

素因数の和:789

約数の個数: 32

約数和(自身を含む): 41990400

約数和(自身を除く): 20339192

約数列:

[1, 2, 4, 8, 47, 89, 94, 178, 188, 356, 376, 647, 712, 1294, 2588, 4183, 5176, 8366, 16732, 30409, 33464, 57583, 60818, 115166, 121636, 230332, 243272, 460664, 2706401, 5412802, 10825604, 21651208]

約数ペア:

[(1, 21651208), (2, 10825604), (4, 5412802), (8, 2706401), (47, 460664), (89, 243272), (94, 230332), (178, 121636), (188, 115166), (356, 60818), (376, 57583), (647, 33464), (712, 30409), (1294, 16732), (2588, 8366), (4183, 5176)]