21183993

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{43}}^2\times {\mathrm{67}}^1$

素因数の和:178

約数の個数: 36

約数和(自身を含む): 33468240

約数和(自身を除く): 12284247

約数列:

[1, 3, 9, 19, 43, 57, 67, 129, 171, 201, 387, 603, 817, 1273, 1849, 2451, 2881, 3819, 5547, 7353, 8643, 11457, 16641, 25929, 35131, 54739, 105393, 123883, 164217, 316179, 371649, 492651, 1114947, 2353777, 7061331, 21183993]

約数ペア:

[(1, 21183993), (3, 7061331), (9, 2353777), (19, 1114947), (43, 492651), (57, 371649), (67, 316179), (129, 164217), (171, 123883), (201, 105393), (387, 54739), (603, 35131), (817, 25929), (1273, 16641), (1849, 11457), (2451, 8643), (2881, 7353), (3819, 5547)]