21978256

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{607}}^1$

素因数の和:719

約数の個数: 40

約数和(自身を含む): 44632064

約数和(自身を除く): 22653808

約数列:

[1, 2, 4, 8, 16, 31, 62, 73, 124, 146, 248, 292, 496, 584, 607, 1168, 1214, 2263, 2428, 4526, 4856, 9052, 9712, 18104, 18817, 36208, 37634, 44311, 75268, 88622, 150536, 177244, 301072, 354488, 708976, 1373641, 2747282, 5494564, 10989128, 21978256]

約数ペア:

[(1, 21978256), (2, 10989128), (4, 5494564), (8, 2747282), (16, 1373641), (31, 708976), (62, 354488), (73, 301072), (124, 177244), (146, 150536), (248, 88622), (292, 75268), (496, 44311), (584, 37634), (607, 36208), (1168, 18817), (1214, 18104), (2263, 9712), (2428, 9052), (4526, 4856)]