20781194

素因数分解:

$2^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{4001}}^1$

素因数の和:4070

約数の個数: 24

約数和(自身を含む): 36954468

約数和(自身を除く): 16173274

約数列:

[1, 2, 7, 14, 49, 53, 98, 106, 371, 742, 2597, 4001, 5194, 8002, 28007, 56014, 196049, 212053, 392098, 424106, 1484371, 2968742, 10390597, 20781194]

約数ペア:

[(1, 20781194), (2, 10390597), (7, 2968742), (14, 1484371), (49, 424106), (53, 392098), (98, 212053), (106, 196049), (371, 56014), (742, 28007), (2597, 8002), (4001, 5194)]