20354187

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{367}}^1$

素因数の和:535

約数の個数: 32

約数和(自身を含む): 32972800

約数和(自身を除く): 12618613

約数列:

[1, 3, 7, 19, 21, 57, 133, 139, 367, 399, 417, 973, 1101, 2569, 2641, 2919, 6973, 7707, 7923, 18487, 20919, 48811, 51013, 55461, 146433, 153039, 357091, 969247, 1071273, 2907741, 6784729, 20354187]

約数ペア:

[(1, 20354187), (3, 6784729), (7, 2907741), (19, 1071273), (21, 969247), (57, 357091), (133, 153039), (139, 146433), (367, 55461), (399, 51013), (417, 48811), (973, 20919), (1101, 18487), (2569, 7923), (2641, 7707), (2919, 6973)]