21788595

素因数分解:

$3^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{227}}^1$

素因数の和:326

約数の個数: 48

約数和(自身を含む): 39836160

約数和(自身を除く): 18047565

約数列:

[1, 3, 5, 9, 15, 27, 45, 79, 81, 135, 227, 237, 243, 395, 405, 681, 711, 1135, 1185, 1215, 2043, 2133, 3405, 3555, 6129, 6399, 10215, 10665, 17933, 18387, 19197, 30645, 31995, 53799, 55161, 89665, 91935, 95985, 161397, 268995, 275805, 484191, 806985, 1452573, 2420955, 4357719, 7262865, 21788595]

約数ペア:

[(1, 21788595), (3, 7262865), (5, 4357719), (9, 2420955), (15, 1452573), (27, 806985), (45, 484191), (79, 275805), (81, 268995), (135, 161397), (227, 95985), (237, 91935), (243, 89665), (395, 55161), (405, 53799), (681, 31995), (711, 30645), (1135, 19197), (1185, 18387), (1215, 17933), (2043, 10665), (2133, 10215), (3405, 6399), (3555, 6129)]