20420421

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{839}}^1$

素因数の和:929

約数の個数: 32

約数和(自身を含む): 33331200

約数和(自身を除く): 12910779

約数列:

[1, 3, 7, 19, 21, 57, 61, 133, 183, 399, 427, 839, 1159, 1281, 2517, 3477, 5873, 8113, 15941, 17619, 24339, 47823, 51179, 111587, 153537, 334761, 358253, 972401, 1074759, 2917203, 6806807, 20420421]

約数ペア:

[(1, 20420421), (3, 6806807), (7, 2917203), (19, 1074759), (21, 972401), (57, 358253), (61, 334761), (133, 153537), (183, 111587), (399, 51179), (427, 47823), (839, 24339), (1159, 17619), (1281, 15941), (2517, 8113), (3477, 5873)]