21006135

素因数分解:

$3^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{113}}^1$

素因数の和:156

約数の個数: 64

約数和(自身を含む): 40383360

約数和(自身を除く): 19377225

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 81, 85, 113, 135, 153, 243, 255, 339, 405, 459, 565, 729, 765, 1017, 1215, 1377, 1695, 1921, 2187, 2295, 3051, 3645, 4131, 5085, 5763, 6885, 9153, 9605, 10935, 12393, 15255, 17289, 20655, 27459, 28815, 37179, 45765, 51867, 61965, 82377, 86445, 137295, 155601, 185895, 247131, 259335, 411885, 466803, 778005, 1235655, 1400409, 2334015, 4201227, 7002045, 21006135]

約数ペア:

[(1, 21006135), (3, 7002045), (5, 4201227), (9, 2334015), (15, 1400409), (17, 1235655), (27, 778005), (45, 466803), (51, 411885), (81, 259335), (85, 247131), (113, 185895), (135, 155601), (153, 137295), (243, 86445), (255, 82377), (339, 61965), (405, 51867), (459, 45765), (565, 37179), (729, 28815), (765, 27459), (1017, 20655), (1215, 17289), (1377, 15255), (1695, 12393), (1921, 10935), (2187, 9605), (2295, 9153), (3051, 6885), (3645, 5763), (4131, 5085)]