21681664

素因数分解:

$2^9\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:135

約数の個数: 80

約数和(自身を含む): 47729088

約数和(自身を除く): 26047424

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 47, 53, 64, 68, 94, 106, 128, 136, 188, 212, 256, 272, 376, 424, 512, 544, 752, 799, 848, 901, 1088, 1504, 1598, 1696, 1802, 2176, 2491, 3008, 3196, 3392, 3604, 4352, 4982, 6016, 6392, 6784, 7208, 8704, 9964, 12032, 12784, 13568, 14416, 19928, 24064, 25568, 27136, 28832, 39856, 42347, 51136, 57664, 79712, 84694, 102272, 115328, 159424, 169388, 204544, 230656, 318848, 338776, 409088, 461312, 637696, 677552, 1275392, 1355104, 2710208, 5420416, 10840832, 21681664]

約数ペア:

[(1, 21681664), (2, 10840832), (4, 5420416), (8, 2710208), (16, 1355104), (17, 1275392), (32, 677552), (34, 637696), (47, 461312), (53, 409088), (64, 338776), (68, 318848), (94, 230656), (106, 204544), (128, 169388), (136, 159424), (188, 115328), (212, 102272), (256, 84694), (272, 79712), (376, 57664), (424, 51136), (512, 42347), (544, 39856), (752, 28832), (799, 27136), (848, 25568), (901, 24064), (1088, 19928), (1504, 14416), (1598, 13568), (1696, 12784), (1802, 12032), (2176, 9964), (2491, 8704), (3008, 7208), (3196, 6784), (3392, 6392), (3604, 6016), (4352, 4982)]