20021421

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^3\times {\mathrm{139}}^1$

素因数の和:206

約数の個数: 32

約数和(自身を含む): 32435200

約数和(自身を除く): 12413779

約数列:

[1, 3, 7, 19, 21, 57, 133, 139, 361, 399, 417, 973, 1083, 2527, 2641, 2919, 6859, 7581, 7923, 18487, 20577, 48013, 50179, 55461, 144039, 150537, 351253, 953401, 1053759, 2860203, 6673807, 20021421]

約数ペア:

[(1, 20021421), (3, 6673807), (7, 2860203), (19, 1053759), (21, 953401), (57, 351253), (133, 150537), (139, 144039), (361, 55461), (399, 50179), (417, 48013), (973, 20577), (1083, 18487), (2527, 7923), (2641, 7581), (2919, 6859)]