217319985

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{209971}}^1$

素因数の和:210005

約数の個数: 24

約数和(自身を含む): 393067584

約数和(自身を除く): 175747599

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 209971, 629913, 1049855, 1889739, 3149565, 4829333, 9448695, 14487999, 24146665, 43463997, 72439995, 217319985]

約数ペア:

[(1, 217319985), (3, 72439995), (5, 43463997), (9, 24146665), (15, 14487999), (23, 9448695), (45, 4829333), (69, 3149565), (115, 1889739), (207, 1049855), (345, 629913), (1035, 209971)]