21561417

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{191}}^1$

素因数の和:350

約数の個数: 32

約数和(自身を含む): 33269760

約数和(自身を除く): 11708343

約数列:

[1, 3, 9, 27, 37, 111, 113, 191, 333, 339, 573, 999, 1017, 1719, 3051, 4181, 5157, 7067, 12543, 21201, 21583, 37629, 63603, 64749, 112887, 190809, 194247, 582741, 798571, 2395713, 7187139, 21561417]

約数ペア:

[(1, 21561417), (3, 7187139), (9, 2395713), (27, 798571), (37, 582741), (111, 194247), (113, 190809), (191, 112887), (333, 64749), (339, 63603), (573, 37629), (999, 21583), (1017, 21201), (1719, 12543), (3051, 7067), (4181, 5157)]