21302528

素因数分解:

$2^8\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{173}}^1$

素因数の和:239

約数の個数: 72

約数和(自身を含む): 47302248

約数和(自身を除く): 25999720

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 37, 52, 64, 74, 104, 128, 148, 173, 208, 256, 296, 346, 416, 481, 592, 692, 832, 962, 1184, 1384, 1664, 1924, 2249, 2368, 2768, 3328, 3848, 4498, 4736, 5536, 6401, 7696, 8996, 9472, 11072, 12802, 15392, 17992, 22144, 25604, 30784, 35984, 44288, 51208, 61568, 71968, 83213, 102416, 123136, 143936, 166426, 204832, 287872, 332852, 409664, 575744, 665704, 819328, 1331408, 1638656, 2662816, 5325632, 10651264, 21302528]

約数ペア:

[(1, 21302528), (2, 10651264), (4, 5325632), (8, 2662816), (13, 1638656), (16, 1331408), (26, 819328), (32, 665704), (37, 575744), (52, 409664), (64, 332852), (74, 287872), (104, 204832), (128, 166426), (148, 143936), (173, 123136), (208, 102416), (256, 83213), (296, 71968), (346, 61568), (416, 51208), (481, 44288), (592, 35984), (692, 30784), (832, 25604), (962, 22144), (1184, 17992), (1384, 15392), (1664, 12802), (1924, 11072), (2249, 9472), (2368, 8996), (2768, 7696), (3328, 6401), (3848, 5536), (4498, 4736)]