21561015

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{257}}^1$

素因数の和:336

約数の個数: 64

約数和(自身を含む): 42799104

約数和(自身を除く): 21238089

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 47, 51, 85, 105, 119, 141, 235, 255, 257, 329, 357, 595, 705, 771, 799, 987, 1285, 1645, 1785, 1799, 2397, 3855, 3995, 4369, 4935, 5397, 5593, 8995, 11985, 12079, 13107, 16779, 21845, 26985, 27965, 30583, 36237, 60395, 65535, 83895, 84553, 91749, 152915, 181185, 205343, 253659, 422765, 458745, 616029, 1026715, 1268295, 1437401, 3080145, 4312203, 7187005, 21561015]

約数ペア:

[(1, 21561015), (3, 7187005), (5, 4312203), (7, 3080145), (15, 1437401), (17, 1268295), (21, 1026715), (35, 616029), (47, 458745), (51, 422765), (85, 253659), (105, 205343), (119, 181185), (141, 152915), (235, 91749), (255, 84553), (257, 83895), (329, 65535), (357, 60395), (595, 36237), (705, 30583), (771, 27965), (799, 26985), (987, 21845), (1285, 16779), (1645, 13107), (1785, 12079), (1799, 11985), (2397, 8995), (3855, 5593), (3995, 5397), (4369, 4935)]