20502279

素因数分解:

$3^2\times 7^1\times {\mathrm{421}}^1\times {\mathrm{773}}^1$

素因数の和:1207

約数の個数: 24

約数和(自身を含む): 33969312

約数和(自身を除く): 13467033

約数列:

[1, 3, 7, 9, 21, 63, 421, 773, 1263, 2319, 2947, 3789, 5411, 6957, 8841, 16233, 26523, 48699, 325433, 976299, 2278031, 2928897, 6834093, 20502279]

約数ペア:

[(1, 20502279), (3, 6834093), (7, 2928897), (9, 2278031), (21, 976299), (63, 325433), (421, 48699), (773, 26523), (1263, 16233), (2319, 8841), (2947, 6957), (3789, 5411)]