21428992

素因数分解:

$2^8\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1$

素因数の和:213

約数の個数: 72

約数和(自身を含む): 47388096

約数和(自身を除く): 25959104

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 47, 52, 64, 94, 104, 128, 137, 188, 208, 256, 274, 376, 416, 548, 611, 752, 832, 1096, 1222, 1504, 1664, 1781, 2192, 2444, 3008, 3328, 3562, 4384, 4888, 6016, 6439, 7124, 8768, 9776, 12032, 12878, 14248, 17536, 19552, 25756, 28496, 35072, 39104, 51512, 56992, 78208, 83707, 103024, 113984, 156416, 167414, 206048, 227968, 334828, 412096, 455936, 669656, 824192, 1339312, 1648384, 2678624, 5357248, 10714496, 21428992]

約数ペア:

[(1, 21428992), (2, 10714496), (4, 5357248), (8, 2678624), (13, 1648384), (16, 1339312), (26, 824192), (32, 669656), (47, 455936), (52, 412096), (64, 334828), (94, 227968), (104, 206048), (128, 167414), (137, 156416), (188, 113984), (208, 103024), (256, 83707), (274, 78208), (376, 56992), (416, 51512), (548, 39104), (611, 35072), (752, 28496), (832, 25756), (1096, 19552), (1222, 17536), (1504, 14248), (1664, 12878), (1781, 12032), (2192, 9776), (2444, 8768), (3008, 7124), (3328, 6439), (3562, 6016), (4384, 4888)]