21088557

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 36516480

約数和(自身を除く): 15427923

約数列:

[1, 3, 7, 9, 21, 37, 63, 83, 109, 111, 249, 259, 327, 333, 581, 747, 763, 777, 981, 1743, 2289, 2331, 3071, 4033, 5229, 6867, 9047, 9213, 12099, 21497, 27141, 27639, 28231, 36297, 63329, 64491, 81423, 84693, 189987, 193473, 254079, 334739, 569961, 1004217, 2343173, 3012651, 7029519, 21088557]

約数ペア:

[(1, 21088557), (3, 7029519), (7, 3012651), (9, 2343173), (21, 1004217), (37, 569961), (63, 334739), (83, 254079), (109, 193473), (111, 189987), (249, 84693), (259, 81423), (327, 64491), (333, 63329), (581, 36297), (747, 28231), (763, 27639), (777, 27141), (981, 21497), (1743, 12099), (2289, 9213), (2331, 9047), (3071, 6867), (4033, 5229)]