21505218

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{193}}^1\times {\mathrm{379}}^1$

素因数の和:591

約数の個数: 48

約数和(自身を含む): 50424480

約数和(自身を除く): 28919262

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 49, 98, 147, 193, 294, 379, 386, 579, 758, 1137, 1158, 1351, 2274, 2653, 2702, 4053, 5306, 7959, 8106, 9457, 15918, 18571, 18914, 28371, 37142, 55713, 56742, 73147, 111426, 146294, 219441, 438882, 512029, 1024058, 1536087, 3072174, 3584203, 7168406, 10752609, 21505218]

約数ペア:

[(1, 21505218), (2, 10752609), (3, 7168406), (6, 3584203), (7, 3072174), (14, 1536087), (21, 1024058), (42, 512029), (49, 438882), (98, 219441), (147, 146294), (193, 111426), (294, 73147), (379, 56742), (386, 55713), (579, 37142), (758, 28371), (1137, 18914), (1158, 18571), (1351, 15918), (2274, 9457), (2653, 8106), (2702, 7959), (4053, 5306)]