21524481

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{137}}^1$

素因数の和:203

約数の個数: 48

約数和(自身を含む): 36630720

約数和(自身を除く): 15106239

約数列:

[1, 3, 9, 11, 23, 27, 33, 69, 99, 137, 207, 253, 297, 411, 529, 621, 759, 1233, 1507, 1587, 2277, 3151, 3699, 4521, 4761, 5819, 6831, 9453, 13563, 14283, 17457, 28359, 34661, 40689, 52371, 72473, 85077, 103983, 157113, 217419, 311949, 652257, 797203, 935847, 1956771, 2391609, 7174827, 21524481]

約数ペア:

[(1, 21524481), (3, 7174827), (9, 2391609), (11, 1956771), (23, 935847), (27, 797203), (33, 652257), (69, 311949), (99, 217419), (137, 157113), (207, 103983), (253, 85077), (297, 72473), (411, 52371), (529, 40689), (621, 34661), (759, 28359), (1233, 17457), (1507, 14283), (1587, 13563), (2277, 9453), (3151, 6831), (3699, 5819), (4521, 4761)]