171978140

素因数分解:

$2^2\times 5^1\times {\mathrm{991}}^1\times {\mathrm{8677}}^1$

素因数の和:9677

約数の個数: 24

約数和(自身を含む): 361560192

約数和(自身を除く): 189582052

約数列:

[1, 2, 4, 5, 10, 20, 991, 1982, 3964, 4955, 8677, 9910, 17354, 19820, 34708, 43385, 86770, 173540, 8598907, 17197814, 34395628, 42994535, 85989070, 171978140]

約数ペア:

[(1, 171978140), (2, 85989070), (4, 42994535), (5, 34395628), (10, 17197814), (20, 8598907), (991, 173540), (1982, 86770), (3964, 43385), (4955, 34708), (8677, 19820), (9910, 17354)]