21913335

素因数分解:

$3^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{887}}^1$

素因数の和:965

約数の個数: 40

約数和(自身を含む): 39970656

約数和(自身を除く): 18057321

約数列:

[1, 3, 5, 9, 15, 27, 45, 61, 81, 135, 183, 305, 405, 549, 887, 915, 1647, 2661, 2745, 4435, 4941, 7983, 8235, 13305, 23949, 24705, 39915, 54107, 71847, 119745, 162321, 270535, 359235, 486963, 811605, 1460889, 2434815, 4382667, 7304445, 21913335]

約数ペア:

[(1, 21913335), (3, 7304445), (5, 4382667), (9, 2434815), (15, 1460889), (27, 811605), (45, 486963), (61, 359235), (81, 270535), (135, 162321), (183, 119745), (305, 71847), (405, 54107), (549, 39915), (887, 24705), (915, 23949), (1647, 13305), (2661, 8235), (2745, 7983), (4435, 4941)]