19984615

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{163}}^1$

素因数の和:319

約数の個数: 32

約数和(自身を含む): 28717056

約数和(自身を除く): 8732441

約数列:

[1, 5, 7, 31, 35, 113, 155, 163, 217, 565, 791, 815, 1085, 1141, 3503, 3955, 5053, 5705, 17515, 18419, 24521, 25265, 35371, 92095, 122605, 128933, 176855, 570989, 644665, 2854945, 3996923, 19984615]

約数ペア:

[(1, 19984615), (5, 3996923), (7, 2854945), (31, 644665), (35, 570989), (113, 176855), (155, 128933), (163, 122605), (217, 92095), (565, 35371), (791, 25265), (815, 24521), (1085, 18419), (1141, 17515), (3503, 5705), (3955, 5053)]