21478352

素因数分解:

$2^4\times 7^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:196

約数の個数: 80

約数和(自身を含む): 50211072

約数和(自身を除く): 28732720

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 37, 56, 71, 73, 74, 112, 142, 146, 148, 259, 284, 292, 296, 497, 511, 518, 568, 584, 592, 994, 1022, 1036, 1136, 1168, 1988, 2044, 2072, 2627, 2701, 3976, 4088, 4144, 5183, 5254, 5402, 7952, 8176, 10366, 10508, 10804, 18389, 18907, 20732, 21016, 21608, 36281, 36778, 37814, 41464, 42032, 43216, 72562, 73556, 75628, 82928, 145124, 147112, 151256, 191771, 290248, 294224, 302512, 383542, 580496, 767084, 1342397, 1534168, 2684794, 3068336, 5369588, 10739176, 21478352]

約数ペア:

[(1, 21478352), (2, 10739176), (4, 5369588), (7, 3068336), (8, 2684794), (14, 1534168), (16, 1342397), (28, 767084), (37, 580496), (56, 383542), (71, 302512), (73, 294224), (74, 290248), (112, 191771), (142, 151256), (146, 147112), (148, 145124), (259, 82928), (284, 75628), (292, 73556), (296, 72562), (497, 43216), (511, 42032), (518, 41464), (568, 37814), (584, 36778), (592, 36281), (994, 21608), (1022, 21016), (1036, 20732), (1136, 18907), (1168, 18389), (1988, 10804), (2044, 10508), (2072, 10366), (2627, 8176), (2701, 7952), (3976, 5402), (4088, 5254), (4144, 5183)]