18221973

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{191}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 31518720

約数和(自身を除く): 13296747

約数列:

[1, 3, 7, 11, 21, 33, 49, 59, 77, 147, 177, 191, 231, 413, 539, 573, 649, 1239, 1337, 1617, 1947, 2101, 2891, 4011, 4543, 6303, 8673, 9359, 11269, 13629, 14707, 28077, 31801, 33807, 44121, 78883, 95403, 102949, 123959, 236649, 308847, 371877, 552181, 867713, 1656543, 2603139, 6073991, 18221973]

約数ペア:

[(1, 18221973), (3, 6073991), (7, 2603139), (11, 1656543), (21, 867713), (33, 552181), (49, 371877), (59, 308847), (77, 236649), (147, 123959), (177, 102949), (191, 95403), (231, 78883), (413, 44121), (539, 33807), (573, 31801), (649, 28077), (1239, 14707), (1337, 13629), (1617, 11269), (1947, 9359), (2101, 8673), (2891, 6303), (4011, 4543)]