21025264

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{271}}^1\times {\mathrm{373}}^1$

素因数の和:665

約数の個数: 40

約数和(自身を含む): 44149952

約数和(自身を除く): 23124688

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 271, 373, 542, 746, 1084, 1492, 2168, 2984, 3523, 4336, 4849, 5968, 7046, 9698, 14092, 19396, 28184, 38792, 56368, 77584, 101083, 202166, 404332, 808664, 1314079, 1617328, 2628158, 5256316, 10512632, 21025264]

約数ペア:

[(1, 21025264), (2, 10512632), (4, 5256316), (8, 2628158), (13, 1617328), (16, 1314079), (26, 808664), (52, 404332), (104, 202166), (208, 101083), (271, 77584), (373, 56368), (542, 38792), (746, 28184), (1084, 19396), (1492, 14092), (2168, 9698), (2984, 7046), (3523, 5968), (4336, 4849)]