21136689

素因数分解:

$3^2\times 7^3\times {\mathrm{41}}^1\times {\mathrm{167}}^1$

素因数の和:235

約数の個数: 48

約数和(自身を含む): 36691200

約数和(自身を除く): 15554511

約数列:

[1, 3, 7, 9, 21, 41, 49, 63, 123, 147, 167, 287, 343, 369, 441, 501, 861, 1029, 1169, 1503, 2009, 2583, 3087, 3507, 6027, 6847, 8183, 10521, 14063, 18081, 20541, 24549, 42189, 47929, 57281, 61623, 73647, 126567, 143787, 171843, 335503, 431361, 515529, 1006509, 2348521, 3019527, 7045563, 21136689]

約数ペア:

[(1, 21136689), (3, 7045563), (7, 3019527), (9, 2348521), (21, 1006509), (41, 515529), (49, 431361), (63, 335503), (123, 171843), (147, 143787), (167, 126567), (287, 73647), (343, 61623), (369, 57281), (441, 47929), (501, 42189), (861, 24549), (1029, 20541), (1169, 18081), (1503, 14063), (2009, 10521), (2583, 8183), (3087, 6847), (3507, 6027)]