21895209

素因数分解:

$3^2\times 7^2\times {\mathrm{131}}^1\times {\mathrm{379}}^1$

素因数の和:530

約数の個数: 36

約数和(自身を含む): 37168560

約数和(自身を除く): 15273351

約数列:

[1, 3, 7, 9, 21, 49, 63, 131, 147, 379, 393, 441, 917, 1137, 1179, 2653, 2751, 3411, 6419, 7959, 8253, 18571, 19257, 23877, 49649, 55713, 57771, 148947, 167139, 347543, 446841, 1042629, 2432801, 3127887, 7298403, 21895209]

約数ペア:

[(1, 21895209), (3, 7298403), (7, 3127887), (9, 2432801), (21, 1042629), (49, 446841), (63, 347543), (131, 167139), (147, 148947), (379, 57771), (393, 55713), (441, 49649), (917, 23877), (1137, 19257), (1179, 18571), (2653, 8253), (2751, 7959), (3411, 6419)]