20561607

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{491}}^1$

素因数の和:561

約数の個数: 40

約数和(自身を含む): 34290432

約数和(自身を除く): 13728825

約数列:

[1, 3, 9, 11, 27, 33, 47, 81, 99, 141, 297, 423, 491, 517, 891, 1269, 1473, 1551, 3807, 4419, 4653, 5401, 13257, 13959, 16203, 23077, 39771, 41877, 48609, 69231, 145827, 207693, 253847, 437481, 623079, 761541, 1869237, 2284623, 6853869, 20561607]

約数ペア:

[(1, 20561607), (3, 6853869), (9, 2284623), (11, 1869237), (27, 761541), (33, 623079), (47, 437481), (81, 253847), (99, 207693), (141, 145827), (297, 69231), (423, 48609), (491, 41877), (517, 39771), (891, 23077), (1269, 16203), (1473, 13959), (1551, 13257), (3807, 5401), (4419, 4653)]