21901671

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{523}}^1$

素因数の和:593

約数の個数: 40

約数和(自身を含む): 36520704

約数和(自身を除く): 14619033

約数列:

[1, 3, 9, 11, 27, 33, 47, 81, 99, 141, 297, 423, 517, 523, 891, 1269, 1551, 1569, 3807, 4653, 4707, 5753, 13959, 14121, 17259, 24581, 41877, 42363, 51777, 73743, 155331, 221229, 270391, 465993, 663687, 811173, 1991061, 2433519, 7300557, 21901671]

約数ペア:

[(1, 21901671), (3, 7300557), (9, 2433519), (11, 1991061), (27, 811173), (33, 663687), (47, 465993), (81, 270391), (99, 221229), (141, 155331), (297, 73743), (423, 51777), (517, 42363), (523, 41877), (891, 24581), (1269, 17259), (1551, 14121), (1569, 13959), (3807, 5753), (4653, 4707)]