20555168

素因数分解:

$2^5\times {\mathrm{47}}^1\times {\mathrm{79}}^1\times {\mathrm{173}}^1$

素因数の和:309

約数の個数: 48

約数和(自身を含む): 42094080

約数和(自身を除く): 21538912

約数列:

[1, 2, 4, 8, 16, 32, 47, 79, 94, 158, 173, 188, 316, 346, 376, 632, 692, 752, 1264, 1384, 1504, 2528, 2768, 3713, 5536, 7426, 8131, 13667, 14852, 16262, 27334, 29704, 32524, 54668, 59408, 65048, 109336, 118816, 130096, 218672, 260192, 437344, 642349, 1284698, 2569396, 5138792, 10277584, 20555168]

約数ペア:

[(1, 20555168), (2, 10277584), (4, 5138792), (8, 2569396), (16, 1284698), (32, 642349), (47, 437344), (79, 260192), (94, 218672), (158, 130096), (173, 118816), (188, 109336), (316, 65048), (346, 59408), (376, 54668), (632, 32524), (692, 29704), (752, 27334), (1264, 16262), (1384, 14852), (1504, 13667), (2528, 8131), (2768, 7426), (3713, 5536)]