20992215

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{857}}^1$

素因数の和:959

約数の個数: 32

約数和(自身を含む): 35582976

約数和(自身を除く): 14590761

約数列:

[1, 3, 5, 15, 23, 69, 71, 115, 213, 345, 355, 857, 1065, 1633, 2571, 4285, 4899, 8165, 12855, 19711, 24495, 59133, 60847, 98555, 182541, 295665, 304235, 912705, 1399481, 4198443, 6997405, 20992215]

約数ペア:

[(1, 20992215), (3, 6997405), (5, 4198443), (15, 1399481), (23, 912705), (69, 304235), (71, 295665), (115, 182541), (213, 98555), (345, 60847), (355, 59133), (857, 24495), (1065, 19711), (1633, 12855), (2571, 8165), (4285, 4899)]