21272979

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2687}}^1$

素因数の和:2739

約数の個数: 32

約数和(自身を含む): 36126720

約数和(自身を除く): 14853741

約数列:

[1, 3, 7, 13, 21, 29, 39, 87, 91, 203, 273, 377, 609, 1131, 2639, 2687, 7917, 8061, 18809, 34931, 56427, 77923, 104793, 233769, 244517, 545461, 733551, 1012999, 1636383, 3038997, 7090993, 21272979]

約数ペア:

[(1, 21272979), (3, 7090993), (7, 3038997), (13, 1636383), (21, 1012999), (29, 733551), (39, 545461), (87, 244517), (91, 233769), (203, 104793), (273, 77923), (377, 56427), (609, 34931), (1131, 18809), (2639, 8061), (2687, 7917)]