20512605561

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{12457}}^1\times {\mathrm{4127}}^1$

素因数の和:16613

約数の個数: 32

約数和(自身を含む): 32913039360

約数和(自身を除く): 12400433799

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 4127, 12381, 12457, 28889, 37371, 78413, 86667, 87199, 235239, 236683, 261597, 548891, 710049, 1646673, 1656781, 4970343, 51410039, 154230117, 359870273, 976790741, 1079610819, 2930372223, 6837535187, 20512605561]

約数ペア:

[(1, 20512605561), (3, 6837535187), (7, 2930372223), (19, 1079610819), (21, 976790741), (57, 359870273), (133, 154230117), (399, 51410039), (4127, 4970343), (12381, 1656781), (12457, 1646673), (28889, 710049), (37371, 548891), (78413, 261597), (86667, 236683), (87199, 235239)]