21990584

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1231}}^1$

素因数の和:1284

約数の個数: 64

約数和(自身を含む): 53222400

約数和(自身を除く): 31231816

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 29, 44, 56, 58, 77, 88, 116, 154, 203, 232, 308, 319, 406, 616, 638, 812, 1231, 1276, 1624, 2233, 2462, 2552, 4466, 4924, 8617, 8932, 9848, 13541, 17234, 17864, 27082, 34468, 35699, 54164, 68936, 71398, 94787, 108328, 142796, 189574, 249893, 285592, 379148, 392689, 499786, 758296, 785378, 999572, 1570756, 1999144, 2748823, 3141512, 5497646, 10995292, 21990584]

約数ペア:

[(1, 21990584), (2, 10995292), (4, 5497646), (7, 3141512), (8, 2748823), (11, 1999144), (14, 1570756), (22, 999572), (28, 785378), (29, 758296), (44, 499786), (56, 392689), (58, 379148), (77, 285592), (88, 249893), (116, 189574), (154, 142796), (203, 108328), (232, 94787), (308, 71398), (319, 68936), (406, 54164), (616, 35699), (638, 34468), (812, 27082), (1231, 17864), (1276, 17234), (1624, 13541), (2233, 9848), (2462, 8932), (2552, 8617), (4466, 4924)]